Two trains are traveling side-by-side along parallel, straight tracks at the same speed. In a time t, train A doubles its speed. In the same time train B increases its speed by a factor of 5.42. By what factor is the distance traveled by train B in time t greater than the distance traveled by train A in the same time t?

Answers

Answer 1

Answer:

yes

Explanation:

Answer 2

Final answer:

The distance traveled by train B in time t is 5.42 times greater than the distance traveled by train A in the same time t.

Explanation:

The distance traveled by train B in time t is greater than the distance traveled by train A in the same time t by a factor of 5.42.

To understand this, let's assume the initial speed of both trains is v. After time t, train A doubles its speed, so its new speed is 2v. On the other hand, train B increases its speed by a factor of 5.42, so its new speed is 5.42v.

Since the distance traveled by a train is directly proportional to its speed, the distance traveled by train B will be 5.42 times greater than the distance traveled by train A in time t.


Related Questions

The deepest mine ever drilled has a depth of 12300 meters. suppose you drop a rock with a mass of .12 kilograms down the shaft of this mine. What would the rock's kinetic energy be after falling 3200 meters? What would the potential energy associated with the rock be at that same moment? Assume no air resistance and a constant free-fall acceleration. (please show the equations used and why you used these equations.) Thank you.​

Answers

Answer:

Correct answer: Ek = 384,000 J = 0.384 · 10⁶ J = 0.384 MJ

                           Ep = 1,092,000 J = 1.092 · 10⁶ J = 1.092 MJ

                           Et  = 1,476,000 J = 1.476 · 10⁶ J = 1.476 MJ

Explanation:

The total energy at all times is equal to the sum of kinetic and potential energy.

Et = Ep + Ek

We will take the bottom of the mine as a reference point

We can solve this problem combined with the help of kinetics and energy conservation laws, or just with energy conservation laws, which I will do.

Before we drop a rock the potential energy is maximum and the kinetic energy is equals to zero.

The formula for calculating potential energy is:

Ep = m g h ,  we will take that g = 10 m/s²

This is the maximum potential energy (or total energy)

Epmax = Et = 12 · 10 · 12,300 = 1,476,000 J = 1.476 · 10⁶ J = 1.476 MJ

After a fall of 3,200 m the rock will be on height of 9,100 m and its potential energy will be:

Ep = m g h₁ = 12 · 10 · 9,100 = 1,092,000 J = 1.092 · 10⁶ J = 1.092 MJ

The difference between the maximum potential energy (or total energy) and the potential energy at height h₁ is actually kinetic energy.

Ek = ΔEp = Et - Ep = 1,476,000 J - 1,092,000 J

Ek = 384,000 J = 0.384 · 10⁶ J = 0.384 MJ

God is with you!!!

Acceleration is defined as a change in velocity over time. If a runner increases velocity
from 2 m/s to 4 m/s over a period of 20 seconds, what is her acceleration?

Answers

Answer:

a = 0,1[m/s^2]

Explanation:

First we need to indentify the initial data.

And using this kinematic equation we have:

[tex]v = 4[m/s]\\v_{0}= 2 [m/s] \\t = 20[s]\\\\v= v_{0}+a*t\\a=\frac{v-v_{0}}{t} \\a= \frac{4-2}{20} \\a=0.1[m/s^{2}][/tex]

explain how friction affects the mechanical energy of a system

Answers

Friction decreases the kinetic energy which decreases the mechanical energy.

Explanation:

When two object moves one over the other, the resistance that is faced by the object is called as the friction. Any force that restricts the motion of any moving or any object that is sliding is called as friction. A kinetic energy can be considered as a non conservative energy that reduced the mechanical energy of any moving objects.

A friction can be considered as a force that resits motion of an object. When there a movement of two objects one against the other, there will be a conversion of kinetic energy into heat energy. This conversion is caused by the friction. Thus, the kinetic energy reduces the mechanical energy and they will be converted into heat energy.

Final answer:

Friction is a force that opposes motion, transforming mechanical energy into other forms like heat, effectively reducing the system's mechanical energy.

Explanation:

Friction is a force that opposes the movement or motion of an object. In a system, when there is movement, friction comes into play. Mechanical energy is the sum of kinetic and potential energy in a system. As friction acts against movement, it transforms the mechanical energy within the system into other forms of energy, such as heat energy, which reduces the system's mechanical energy. Let's consider a sliding block for example. As the block slides, the friction between the block and the surface generates heat, thus reducing the mechanical energy (kinetic energy) of the block.

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what is the force acting on the object?(g=10m/s^2)​

Answers

Answer:w=mxg

2x10 =20 N

Explanation:force acting downwards is mg mass into gravitional feild

Boyle's Law states that as the pressure on a gas increases at constant temperature the volume of the gas
A) Increases
B) Decreases
C) Stays the same
D) There is no relationship between pressure and volume

Answers

Boyle’s law is P1V1 = P2V2. This shows that pressure and volume have an inverse relationship, so increase in pressure causes a decrease in volume. B is your answer
Final answer:

Boyle's Law states that the volume of a gas decreases as pressure increases at constant temperature. This is a fundamental concept in Chemistry.

Explanation:

Boyle's Law, a fundamental principle in Chemistry and Physics, states that at a constant temperature, the volume of a gas is inversely proportional to the pressure applied on it. So, if the pressure on a gas increases and the temperature remains constant, the volume of the gas correspondingly decreases (Option B). In other words, if you squeeze a gas (increasing the pressure), it will take up less space (decreasing the volume), provided the temperature does not change.

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Gizmo weight and mass

Answers

Mass refers to the amount of matter in an object. It is a measure of the quantity of particles (atoms and molecules) comprising an object.

Weight, on the other hand, is the force exerted on an object due to gravity.

What is the difference between weight and mass?

The terms "weight" and "mass" are often used interchangeably, but they are actually two different things.

Mass is a measure of the amount of matter in an object. It is a scalar quantity, which means that it has magnitude only. Mass is measured in kilograms (kg) or grams (g). The mass of an object does not change, regardless of where it is located or how it is moving.

Weight is a measure of the force exerted on an object due to gravity. It is a vector quantity, which means that it has both magnitude and direction. Weight is measured in newtons (N).

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Write the names of the metalloids in order from lowest to highest atomic number.

Answers

Answer:

Boron, silicon, germanium, arsenic, antimony, tellurrin, polonium, Astatine

Explanation:

Calculate the work done by a 47 N force pushing a pencil 0.26 m.

Answers

Answer:

Workdone = 12.2 Joules

Explanation:

Given:

Force applied on the pencil = 47 N

Displacement of the pencil = 0.26 m

We have to find the work done .

Note:

Workdone = Product of force and its displacement (in the direction of the force) .

So,

Plugging the values.

Workdone = [tex]Force\times displacement[/tex]

⇒ [tex]W=F\times d[/tex]

⇒ [tex]W =47\times 0.26[/tex]

⇒ [tex]W=12.2[/tex] Joules (J)

OR

We can say that the displacement is against the direction of applied force.

Displacement = - 0.26

Workdone = [tex]F\times d\times cos(\theta)[/tex]

⇒ [tex]\theta[/tex] is the angle between force and displacement.

⇒ Here, [tex]\theta=180[/tex]

⇒ [tex]cos(180) = -1[/tex]

Workdone (W)  = [tex]Fdcos(\theta)[/tex]

⇒ [tex]47\times -0.26\times -1[/tex]

⇒ [tex]12.2[/tex]  Joules (J).

Workdone on pushing the pencil = 12.2 Joules.

Work is the product of the force and displacement. The work done by in the given situation 12.2 J.

Work:

It is the change in the energy due displacement  of the object by the applied force. Work is the product of the force and displacement.

W = f.d

Where,

W - work

f- force =  47 N

d - displacement = 0.26 m.

put the values in the formula,

W =  47 N x 0.26 m.

W = 12.2 J

Therefore, the work done by in the given situation 12.2 J.

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The amusement park ride shown above takes riders straight up a tall tower and then releases an apparatus holding seats. This apparatus free-falls back to Earth and is stopped safely right above the ground. Which of the following indicates the magnitude of the gravitational force exerted on a rider of mass m on the way up and on the way down?

Answers

The answer & explanation for this question is given in the attachment below.

Final answer:

The magnitude of the gravitational force exerted on a rider of mass m during both ascent and descent on an amusement park ride is defined as F = mg, with F being the gravitational force, m the mass of the rider, and g the acceleration due to gravity (~9.81 m/s²).

Explanation:

The gravitational force exerted on a rider with a mass m during both ascent and descent in an amusement park ride is characterized by the same magnitude. This force is given by the expression F = mg, where F is the gravitational force, m is the mass of the rider, and g is the acceleration due to gravity, which is approximately 9.81 m/s² on Earth. Let's break this down:

On the way up: The gravitational force is acting downwards, against the motion of the rider. This force works to slow the upward motion of the rider.On the way down: The gravitational force is acting downwards, in the same direction as the motion of the rider. This force is what causes the rider to accelerate downwards, or free-fall, until the apparatus is safely stopped just above the ground.

In both scenarios, note that the actual sensation the rider feels (the 'felt' force) might be different due to the combination of gravitational force and the inertia of the rider's body. This inertia entails a resistance to changes in motion and can lead to what we often describe as the 'thrill' of the ride.

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Select the correct answer from each drop-down
Two magnets are placed as shown in the
00
В
D
between the poles B and
. And the force of
between the poles A and DIS
Reset
Next

Answers

The force of repulsion between the poles B and C is minimum and the force of attraction between the poles A and D maximum.

Answer: Repulsion, Minimum, Attraction, Maximum

Explanation:

The Concept of attraction & Repulsion

The basic concept of attraction and repulsion between two similar and opposite poles of a bar magnet is that the ends of two bar magnets with similar strongly repel each other whereas poles of opposite polarity attract each other.

Since B and C are of opposite polarity, they will repel each other with minimum forces whereas A and D are of opposite polarity as well, hence they will attract each other with maximum forces when placed together.

We can flip the options accordingly saying, B and C will have the maximum attraction while A and D will have the minimum repulsion when placed together.

In this section of a circuit, a current of 2.5 A flows across R2. Find the current that flows across R3. Let R1= 3.0 ohm, R2= 8.0 ohm, and R3= 4.0 ohm

A. 2.5 A
B. 10 A
C. 6.7 A
D. 5.0 A

Answers

D. 5.0A because this is right and will lead to the right answer okay you got this girl letssssss goooo googoggo Gogol
That would be (D) 5.0

which formula is used to calculate the change in an object's momentum

Answers

Answer:

The change in momentum of an object is its mass times the change in its velocity.

The formula to calculate the change in momentum of the object is ΔP= m( Vf - Vi).

What is a change in momentum?

The change in momentum is equal to the product of the mass and the velocity change. Because mass is a constant value, it remains constant. The change in velocity causes a change in momentum.

The change in momentum is calculated as the difference in the velocities of the object.

Momentum is the product of an object's mass and velocity and describes mass in motion. Impulse: An impulse is a force that causes a change in motion. The change in momentum of an object, p=m(vf-vi) p = m (vf- vI p = m (vf - vI is equivalent to the impulse, J.

Therefore, the formula to calculate the change in momentum of the object is ΔP= m( Vf - Vi).

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A student measures the mass and gravitational force on one textbook. If you double the mass by using two textbooks, what would happen to the gravitational force?

the force would not change
the force would more than double
the force would less than double
the force would double

Answers

Answer:

the force would not change

Explanation:

the answer is the force would double. i just did the test and got it right!

which description matches with which graph?

Answers

Answer:

Description 1 matches C.

Description 2 matches A.

Description 3 matches D.

Description 4 matches B.

Explanation:

Description 1 matches C. From graph C, we can see that the distance remains constant at a particular value. Hence, the car is not traveling and hence it is stopped.

Description 2 matches A. Speed is determined by the gradient of a distance-time graph. A depicts a linear graph which tells us that the gradient is constant and hence the car is at constant speed. The fact that the distance is increasing shows that the car is moving forward.

Description 3 matches D. Graph of D becomes less steeper as time progresses. This tells us that the gradient of the graph is decreasing and hence the speed of the car is decreasing.

Description 4 matches B. Graph B shows distance being decreased. This tells us that the car is coming back.

You are standing on a bathroom scale in an elevator that is not moving and it reads 600N. The elevator then moves upward at a constant velocity of 3.25 m/s. what does the scale read?

Answers

While the elevator is speeding up from zero to 3.25 m/s, the scale reads something more than 600N. But once the elevator settles into a constant speed ... whatever that is ... the scale settles back to 600N.

A bowling ball rolling at a certain speed has a kinetic energy of 12 J. What will be its new kinetic energy if it now rolls at 3 times the old speed?

Answers

The new kinetic energy of the bowling ball is 108 J,

Answer:

Explanation:

Any object in motion will experience an amount of kinetic energy. So the kinetic energy is directly proportional to the product of mass and square of velocity of the object. In the present case, the bowling ball is experiencing a kinetic energy of 12 J.

So, K.E. = 12 J = [tex]\frac{1}{2}mv^{2}[/tex]

As the ball will be having same mass, so when the velocity is increased three times of old velocity, so new speed will be 3v, where v is the old speed. Then the new kinetic energy will be as below:

New kinetic energy = [tex]\frac{1}{2}m(3v)^{2} = \frac{9}{2}mv^{2}[/tex]

Since we know that [tex]\frac{1}{2}mv^{2}[/tex] = 12 J, substitute this in new kinetic energy equation and we get

New kinetic energy = 9 × 12 J = 108 J.

Hence the new kinetic energy of the bowling ball is 108 J, when the new speed is three times the old speed,

Which of the following is true about the movement of stars in the night sky?

A.
Stars in the sky appear to move slowly from south to north.

B.
Stars in the sky appear to move slowly from north to south.

C.
Stars in the sky appear to move slowly from west to east.

D.
Stars in the sky appear to move slowly from east to west.

Answers

"Stars in the sky appear to move slowly from east to west" is true about the movement of stars in the night sky.

Answer: Option D

Explanation:

The Sun, Moon and stars all are understood to wake up in the East and set in the West direction, as every 24 hours the Earth rotates on its axis in the reverse direction from West to East. Consequently, the acceleration we witness is not their action, but ourselves as we go zipping onto the Earth's surface to the North, and these gravitational anomalies fly over us. For illustrating this point, the North Star named as Polaris in Ursa Minor is useful.

Stars in the night sky seem to move slowly from east to west due to the Earth's rotation.

Stars in the sky appear to move slowly from east to west. This apparent motion is due to the rotation of the Earth. As the Earth rotates from west to east, the stars appear to move in the opposite direction.

Research the potential for a large earthquake off the coast of Oregon. What are two of the biggest concerns with a large earthquake in this area?

Answers

There is a 33% chance of a large earthquake off the coast of Oregon.

The two main concerns of a large earthquake are Gas fires and Tsunami .

Explanation:

Everytime a large earthquake hits in any other part of the world, We find a small earthquake hitting off the coast of Oregon.

So scientists feel that as United States is prone to Earthquakes, the people have to be prepared for such eventualities.

The main concern for this large earthquake is, that it might lead to gas leakages at homes that can start a gas fire, which might spread. So people have to be careful and check  on any gas leakages.

Such large earthquakes can also lead to tsunami waves. So people have to take precautions and evacuate, if they are near the coastline.

Which of the following is the most accurate description of the relationship between velocity
and acceleration?
A. Velocity and acceleration are the same thing.
B. Velocity is a type of acceleration.
C. Acceleration is a change in velocity.
D. Acceleration is positive and velocity is negative.

Answers

Answer:

(C) acceleration is a change in velocity.

Explanation :

Acceleration is the rate of change of velocity with time.

Final answer:

Acceleration is the rate at which velocity changes, making option C ('Acceleration is a change in velocity.') the most accurate description of the relationship between velocity and acceleration.

Explanation:

The most accurate description of the relationship between velocity and acceleration is that acceleration is the rate at which velocity changes. Therefore, the correct answer to the question is 'C. Acceleration is a change in velocity.'

Acceleration is a vector quantity, which means it has both magnitude and direction. It can result from a change in speed, a change in direction, or both. Velocity is also a vector that describes the speed of an object in a given direction. When an object's velocity changes, it is accelerating, which can be a result of increasing speed, decreasing speed, or changing direction.

In summary, while velocity is the rate of change of position with time, acceleration is the rate of change of velocity with time.

a 24 volt doorbell carries a current of 1/2 ampere. Calculate the resistance in the bell

1.
2.
3.

Answers

Answer:

48Ω

Explanation:

V = I*R

R = Resistance = ?

V = Voltage = 24volt

I = Current = 1/2amp

Therefore,

R = V / I = 24 / (1/2)

R = 24 * 2

R = 48Ω

The energy stored in gasoline is
A chemical energy
B electromagnetic energy
C mechanical energy
D nuclear energy

Answers

The answer is A, Chemical Energy.
Final answer:

Gasoline stores chemical energy, which can be transformed to other types of energy via chemical reactions, such as the combustion in a car engine.

Explanation:

The energy encapsulated within gasoline can be precisely characterized as chemical energy. This type of energy is encapsulated within the chemical bonds of various compounds, encompassing molecules and atoms. It is significant to note that chemical energy, as a versatile energy form, can be both liberated and harnessed as a source of power in diverse applications.

In the case of gasoline, it represents a potent reservoir of chemical energy. When gasoline undergoes combustion in the engine of a car, it engages in a chemical reaction. This reaction leads to the release of the energy contained within the chemical bonds of gasoline molecules. This released energy manifests in the form of mechanical power, propelling the vehicle, and heat energy, which warms the engine and the surrounding environment. In this process, gasoline's chemical energy is converted into mechanical and thermal energy, illustrating the dynamic interplay between different forms of energy in our daily lives.

The precise understanding of chemical energy's role in powering engines and facilitating various industrial processes underscores the fundamental principles of energy transformation and utilization, forming the basis of many technological advancements and applications.

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Nitrogen -13 has a half life of 10 minutes how long will it take for a sample of 500 g to be reduced to 62.5 g?

Answers

Answer:

30 minutes

Explanation:

Use half life equation:

A = A₀ (½)^(t / T)

where A is the final amount, A₀ is the initial amount, t is time, and T is the half life.

A = A₀ (½)^(t / T)

62.5 = 500 (½)^(t / 10)

0.125 = ½^(t / 10)

t / 10 = 3

t = 30

It will take 30 minutes.

Final answer:

To find the time it takes for a 500 g sample of Nitrogen-13 to be reduced to 62.5 g, we can use the equation for radioactive decay. The time is approximately 40 minutes.

Explanation:

To solve this problem, we can use the equation for radioactive decay: N = N0 * (1/2)(t/t1/2), where N is the final amount, N0 is the initial amount, t is the time passed, and t1/2 is the half-life. In this case, we have N = 62.5 g, N0 = 500 g, and t1/2 = 10 minutes. Substituting these values into the equation:



62.5 g = 500 g * (1/2)(t/10)



Now, we can solve for t by taking the logarithm of both sides and rearranging the equation:



t = 10 * log2(62.5/500)



Using a calculator, the value of t is approximately 40 minutes.

A. A boy was at a park one day. The park was _______ (number) meters away from his house.

Answers

Based on the graph, I would say the correct answer is 11 meters.

The reason I say this is because if you look at the orange line. He's leaving the park to his home. Is shows that it's 11 meters away. The green line is just there to trick you. It shows that you were already 5 meters closer to the park then at home.

What is the kinetic energy of a 150 kg object moving at a velocity of 15 m/s?
25312.5 j
16875 j
50625 j
33750 j

Answers

Answer:16875joules

Explanation:

Mass=m=150kg velocity=v=15m/s

kinetic energy =(m x v^2)/2

Kinetic energy =(150x15^2)/2

Kinetic energy =(150x225)/2

kinetic energy =33750/2

Kinetic energy =16875joules

How Far East have you traveled if you ran 80 meters northeast

Answers

The student has traveled approximately 56.57 meters east.

In this case, the student has traveled 80 meters in a northeast direction. To determine how far east the student has traveled, we need to find the eastward component of their displacement.

Since the northeast direction can be broken down into equal north and east components, we can use trigonometry to determine the eastward displacement.

By using the sine function, we can find that the eastward displacement is approximately 56.57 meters.

A body that goes a distance and then returns to its starting point has the same beginning and ending points. In this case, the displacement is zero, but the distance travelled is not. It is possible to have zero, negative, or even positive displacements.

Therefore, the average velocity is usually 0 when the overall displacement is zero. To gain a better understanding, keep in mind that a body's displacement is a vector, meaning it depends on its direction. Its precise definition is the object's position change rate in a given direction.

Suppose that you fill an ice-cube tray with water from the sink and put the trash in the freezer. The water’s temperature decreases because _________.
a. Cool air in the freezer flows into the water
b. Thermal energy flows out of the water into the air in the freezer
c. Water evaporates and moves into the air in the freezer
d. the water contracts at a lower temperature
I need help asap, thank you

Answers

b. Thermal energy flows out of the water into the air in the freezer

Explanation:

As we know that water has the freezing point in zero degree Celsius and the boiling point is in 100 degree Celsius.The process of freezing happens when water molecules reach a state where it can move because of the less temperature so it starts coming to each other and form a crystal structure. The process of forming a crystal structure happens due to the flow of thermal energy to the cold surrounding temperature. This is the same reason why you feel cold also.

Which of these is changed by the Milankovitch cycles?

A) the reflectivity of Earth

B) the amount of solar energy that reaches Earth

C) the length of a year on Earth

D) the duration of seasons on Earth

Answers

The amount of solar energy that reaches Earth is changed by Milankovitch cycles.

Explanation:

Milankovitch cycles occur due to slight changes in the orbit of the Earth around the Sun. These could be changes in its eccentricity or even tilt in the axis.These cycles caused due to small changes have different effects on how much solar energy reaches the Earth and the time at which maximum sunlight is received.These cycles are very important as the amount of solar energy or sunlight reaching the Earth also affects the climate on the Earth. The ice ages are examples of such changes in the climate. They are strongly connected to the changes in the orbit of the Earth.
Final answer:

The Milankovitch cycles affect the amount of solar energy reaching Earth through changes in Earth's orbital shape and axial tilt over thousands of years. The correct option is B) the amount of solar energy that reaches Earth.

Explanation:

The Milankovitch cycles affect the amount of solar energy that reaches Earth. These cycles consist of changes in Earth's orbit and axial tilt over thousands of years. Of the options provided, B) the amount of solar energy that reaches Earth is the aspect that is changed by the Milankovitch cycles. Specifically, eccentricity, which is one of these cycles, alters the shape of Earth's orbital path from more circular to more elliptical over approximately 100,000 years. This affects the proximity of Earth to the sun during various parts of the orbit, thereby influencing the solar radiation the planet receives.

Which statements describe the Mercalli scale? Check all that apply.

Answers

Full Question:

Which statements describe the Mercalli scale? Check all that apply. This scale measures seismic waves based on their size. This scale rates an earthquake according to how much damage it causes. This scale produces a single rating for earthquakes that reach the surface. This scale uses Roman numerals to rank the damage caused by an earthquake. This scale measures the magnitude of an earthquake based on the size of seismic waves.

This scale rates an earthquake according to how much damage it causes.

This scale uses Roman numerals to rank the damage caused by an earthquake.

Explanation:

The intensities of the earthquake can be easily measured with the scale called The Mercalli intensity scale. The Scale called the Richter scale considers the energy of the earthquake. But the Mercalli scale will not consider the energy of the earthquake.

The effects of the earthquake is considered by the Mercalli scale and then the intensity of the earthquake will be calculated based on the effects that is being observed.It is a type of linear measurement. It uses the Roman numerals for the purpose of ranking the damages that are caused by the earthquake.

Answer:

This scale rates an earthquake according to how much damage it causes.

This scale uses Roman numerals to rank the damage caused by an earthquake.

Explanation:

Its CORRECT because I passed the test 100% on e d g e n u i t y 2020

An object is located 40.0 cm from a convex lens. The lens focuses light at a
distance of 10.0 cm. What is the image distance?
dof
Use the equation de

Answers

The image of distance (di) of the object is 13.33 cm.

Explanation:

Given data in the problem,

The object located at a distance from the convex lens.

do = 40.0 cm

The distance at which the light is focused.

f= 10.0 cm.

We need to find the image of distance di.

The lens equation gives the quantitative relation among the image distance (di), the object distance (do), and the focal length (f).

The equation is given by,

[tex]\frac{1}{f} =\frac{1}{di} +\frac{1}{do}[/tex].

[tex]\frac{1}{10} =\frac{1}{di} +\frac{1}{40}[/tex].

[tex]\frac{1}{10} -\frac{1}{40} =\frac{1}{di}[/tex].

[tex]\frac{4-1}{40}=\frac{1}{di}.\\[/tex]

[tex]\frac{3}{40} = \frac{1}{di}[/tex].

3 di=40.

di=[tex]\frac{40}{3}[/tex].

di = 13.33 cm

The image of distance (di) of the object is 13.33 cm.

if a star 100 light years from earth is beginning to expand into a giant star how long will it take for astronomers to observe this development explain

Answers

Final answer:

If a star 100 light-years away begins to expand, it will take 100 years for astronomers on Earth to observe the event, as light from the expansion will take that long to travel the distance to our planet.

Explanation:

If a star 100 light-years away from Earth is beginning to expand into a giant star, astronomers will observe this development after 100 years. This delay is because the light from that event will take 100 years to travel the distance from the star to Earth. As light is the fastest thing in the universe, moving at over 186,000 miles per second, it is the speed at which we receive information from the cosmos. So, even if the star began to expand today, we would not be aware of it until 100 years later - when the light showing the star's expansion arrives here. This concept is similar to observing galaxies through the universe, which allows us to see them as they were when the light left them, essentially looking back in time.

Other Questions
Which type of thermal energy transfer causes clouds to form?Question 2 options:convectionconductionradiationfreezing PLEASE HELP QUICK IM TIMEDRead the paragraph below, look for the big idea.Drowning is a leading cause of death among very young children. In fact, drowning kills more children aged 1-4 years than anything else except birth defects. Of drowning victims who survive and are treated in emergency rooms, more than half are hospitalized. They often experience brain damage, which can cause memory problems, learning disabilities, or a permanent loss of basic functioninga coma state. Swimmers can prevent drowning by learning swimming skills like floating, by wearing life vests, and by swimming under the supervision of parents, caregivers, or lifeguards who know cardiopulmonary resuscitation (CPR).What main point does the author make about the dangers of drowning?Drowning is a leading cause of death among children aged 1 4.Drowning victims may suffer from permanent injuries even if they survive.Parents can prevent drowning by teaching their young children special swimming skills.The risk of drowning is very high for young children, but there are ways to protect them:class language arts What is the purpose of Henrys speech and pains pamphlet? A cylinder contains oxygen at a pressure of 10.0 atm and a temperature of 300.0 K. The volume of the cylinder is 10,000 mL. What is the mass of oxygen gas? Simplify the radical 80 It cost $6 to join an online DVD club and $2.50 to rent a DVD. Write an equation for the relationship that gives the total cost y in dollars for renting x DVD. Then complete the table. DVD rented 3, 4, 5. Which option best describes decision making?O A.It is the process of choosing an option from two or more alternatives.B.It is the process of choosing the best solution from various options.C. It is the process of finding the perfect solution from various alternatives.OD. It is the process of solving a problem. Match each vocabulary word to the correct definition. where did European languages come from organism interaction and relationship webquest 6. How is the image of the "shape with lion body and the head of a man" (Line 14) important to the poem as a whole? If 5(3-2y)+4y=8 what is y One bit of evidence that the quantum mechanical model is "correct" lies in the magnetic properties of matter. Atoms with unpaired electrons are attracted by magnetic fields and thus are said to exhibit paramagnetism. The degree to which this effect is observed is directly related to the number of unpaired electrons present in the atom. Consider the ground-state electron configuration for . Would this atom be expected to be paramagnetic, and how many unpaired electrons are present? It has unpaired electron(s). Consider the ground-state electron configuration for . Would this atom be expected to be paramagnetic, and how many unpaired electrons are present? Consider the following types of data that were obtained from a random sample of 49 credit card accounts. Identify all the averages (mean, median, or mode) that can be used to summarize the data. (Select all that apply.)(a) Outstanding balance on each account.A. modeB. medianC. mean number 24 please help Describe the Suns interior. Include references to the main physical processes that occur at various depths within the sun. Given the figure below find the values of x and z. hich one of the following statements could be an operational definition of electric current?View Available Hint(s)Which one of the following statements could be an operational definition of electric current?The magnitude of the physical quantity of electric current I in a wire equals the magnitude of the electric charge q that passes through a cross section of the wire divided by the time interval t needed for that charge to pass. Powers held by the national government are called _______ Wastewater from a cement factory contains 0.280 g of Ca2 ion and 0.0550 g of Mg2 ion per 100.0 L of solution. The solution density is 1.001 g/mL. Calculate the Ca2 and Mg2 concentrations in ppm (by mass).