Final answer:
The net force is the greatest when the forces are in the same direction and have the greatest magnitude. The net force is zero when the forces are balanced and cancel each other out.
Explanation:
The net force on an object is the vector sum of all the forces acting on it. The magnitude of the net force can be determined by considering the individual forces acting on the object. The net force is the greatest at points where the forces acting on the object are in the same direction and have the greatest magnitude.
The net force is zero when the forces acting on the object are balanced and cancel each other out. This occurs at points where the forces are equal in magnitude and opposite in direction.
For example, let's say we have two forces acting on an object: 10 N to the right and 5 N to the left. At the point where the forces are added, the net force would be 5 N to the right (10 N - 5 N). This is the greatest net force. At the point where the forces cancel each other out, the net force would be zero (10 N - 10 N).
How do molecules behave when they transition from a solid, liquid, to gas?
What is a horizontal segment meaning on a position vs. time graph?
The velocity of the object is zero (the object is at rest)
Explanation:
A position vs time graph represents the motion of an object; in particular:
The position of the object x(t) is represented on the y-axisThe time t is represented on the x-axisFor a position-time graph, the slope of the graph is given by
[tex]m=\frac{\Delta x}{\Delta t}[/tex]
where
[tex]\Delta x[/tex] is the change in position
[tex]\Delta t[/tex] is the change in time
However, we see that this is equivalent to the definition of velocity:
[tex]v=\frac{\Delta x}{\Delta t}[/tex]
Therefore, the slope of a position-time graph is equivalent to the velocity of the object.
And so, a horizontal segment on a position vs time graph means that the object has zero velocity (because the slope is zero).
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Plant and animal cells make exact copies through the process of)mitosis.B)oxidation.C)segmentation.D)interactive replacement.
Answer:
(A) Mitosis
Explanation:
With what velocity Must a 0.53 kg softball be moving to be equal to the momentum of a 0.31 kg baseball moving at 21 m/s
Answer:12.28m/s
Explanation:
momentum of baseball =mass of baseball x velocity of baseball
Momentum of baseball =0.31x21
Momentum of baseball =6.51kgm/s
For a softball to have same momentum with the baseball we can say :momentum of baseball =mass of softball x velocity of softball
6.51=0.53 x velocity of softball
Velocity of softball =6.51/0.53
Velocity of softball =12.28m/s
The velocity of the softball that must be equal to the momentum of the baseball is 12.28 m/s.
The given parameters;
mass of the soft ball, m₁ = 0.53 kgmass of the baseball, m₂ = 0.31 kgvelocity of the baseball, u₂ = 21 m/sApply the principle of conservation of linear momentum to determine the velocity of the softball;
[tex]m_1u_1 = m_2 u_2\\\\u_1 = \frac{m_2 u_2}{m_1} \\\\u_1 = \frac{0.31 \times 21}{0.53} \\\\u_1 = 12.28 \ m/s[/tex]
Thus, the velocity of the softball that must be equal to the momentum of the baseball is 12.28 m/s.
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A 2-kg toy car accelerates from 5 to 10 m/s.
A 2-kg toy car accelerates from 5 to 10 m/s in 2 seconds. Find the applied force.
Answer:Force applied is [tex]5\frac {kgm} {s^2}[/tex].
Explanation:Force is defined as something which changes or tends to change the velocity of a body. And acceleration is defined as the rate of change of velocity of a body per time. Both of them are vector quantities.
The initial velocity of the body = 5 m/s.
The final velocity of the body = 10 m/s.
So the change in velocity = 10 - 5 m/s = 5m/s.
Time period = 2 seconds.
So acceleration =[tex]\frac52 m/s^2[/tex]= [tex]2.5 m/s^2[/tex]
The force is defined as the product of mass and acceleration of the body.
Mass of body = 2 kg.
So, force applied = [tex]2 \times 2.5 kgm/s^2[/tex]. =[tex]5kgm/s^2[/tex].
These graphs show measurements of the density of air as different sound waves pass a single point.
Which sound wave will most likely be perceived as the loudest?
Answer: D!
It is the option with the greatest amplitude.
Answer: The graph with the highest density of air.
Explanation: The graphs are missing, but il try to explain this problem anyways.
Soundwaves are mechanical waves, that need a medium to move (commonly, the medium is the air)
As those mechanical waves affect the air, the density of air in some areas increase and in others decrease, and when that "wave of air" impacts a receptor, like your ear, you receive the information of the sound, like pitch and intensity.
As more air impacts the receptor, more "loud" is the noise, and as you may know, density = mass/volume, so as biggest is the density of air in a point, this means that we have more mass of air at that point, which is directly related to the intensity or loudness of the sound wave at that point
Solar System 101: How is Venus’ rotation different than most planets? Question 3 options: A.It spins the opposite direction of most planets. B.It is hotter. C.It doesn't rotate. D.It spins the same as Earth.
A. It spins the opposite direction of most planets
Explanation:
Venus is not close to earth but still, it is very hot. Venus's atmosphere consists of a thick layer of greenhouse gases, carbon dioxide and the clouds in Venus is made up of sulfuric acid.The rotation of Venus is very slow, it takes around 243 days compared with earth to finish one rotation. Venus is different because it spins in the opposite direction to earth and also to most of the other planets.Venus does not have moons as mercury.Flexibility is a key characteristic for all leadership styles.
Please select the best answer from the choices provided.
T
F
Explanation:
the answer is true....maybe
Flexibility Leaders can able to adapt changes in circumstances and modify the way of approaching. Hence, the option A is correct.
What is Flexible Leadership?Flexibility in leadership is the important quality for the leaders. It helps the leaders to adapt changes in their leadership style and serves the best for their team.
Flexible leaders can modify their style and way of approaching the situations. Those leaders can earn the trust of the people and encourage new ideas to increase productivity.
They can approach the situations in creative manner and incorporate new innovation and overcome the challenges. Flexible leaders enhance the sustainable growth and profit.
Hence, Flexibility is a key characteristic for all leadership styles is True.
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The “Big Bang” is an example of what type of scientific statement?
Answer:
The big bang is a example of scientific theory
Explanation:
The Big Bang is an example of a scientific theory about the origins and evolution of the universe. It has been substantiated through numerous tests and observations, specifically those related to the cosmic microwave background radiation and the expansion of the universe.
Explanation:The 'Big Bang' is an example of a scientific theory. A scientific theory is an explanation for a range of phenomena that has been substantiated through repeated testing and observation. In this case, the Big Bang theory explains the origins and evolution of the universe. According to this theory, the universe originated from a singularity, a point of infinite density and temperature, about 13.8 billion years ago, and it has been expanding ever since. This theory is based on a wide range of observations, including those related to the cosmic microwave background radiation and the expansion of the universe.
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What is an example of a non contact force
Answer: Gravitational force
Explanation:
A non contact force can be described as a force applied to an object by another body that is not in direct contact with it.
For example, an object thrown upwards will return back due to the force of gravity acting on it. So, it means Gravitational force is acting on the body without necessarily being in contact with that body.
The Milky Way measures _________ light years in diameter.
Answer:
The Milky Way is about 1,000,000,000,000,000,000 km (about 100,000 light years or about 30 kpc) across. The Sun does not lie near the center of our Galaxy. It lies about 8 kpc from the center on what is known as the Orion Arm of the Milky Way.
A weightlifter lifted 800 Newtons to a height of 2.5 meters. What is the power output if this was
done in 1.22 seconds?
The power required is 1.6 kW.
Answer:
Explanation:
Power is defined as the amount of work done on any object for a given time interval. In other words, power is the amount of force required to move an object in a given period of time.
Power = Work done / time taken for that work done.
Here the force is given as 800 N and the displacement is given as 2.5 m, while the time required for the displacement is given as 1.22 seconds.
So the power will be ratio of the product of force acting on the weightlifter, displacement of the weight to the time taken for that displacement.
Power = (800×2.5)/1.22 =1639 W
So the power required is 1.6 kW.
Types of mechanical waves include
transverse waves.
longitudinal waves.
surface waves.
all of the above.
Mechanical waves are categorized into transverse, longitudinal, and surface waves. Transverse waves have disturbances perpendicular to wave direction, longitudinal waves have parallel disturbances, and surface waves are a combination of both.
Explanation:Mechanical waves can be classified based on the type of motion involved in the wave's propagation. There are mainly two categories of mechanical waves, namely transverse waves and longitudinal waves. However, there is also a third category known as surface waves, which is a combination of both transverse and longitudinal motions.
Transverse waves are characterized by a disturbance that moves perpendicular to the direction of wave propagation. An example of a transverse wave is a wave on a string or an electromagnetic wave, such as visible light. Whereas, longitudinal waves have disturbances that move parallel to the direction of propagation, like sound waves in air or water.
Surface waves are typically observed in fluids, like water waves in the ocean, where the motion of the particles at the surface follows a circular path, thus involving both longitudinal and transverse motions.
Therefore, when considering the types of mechanical waves, the answer would be all of the above as it includes transverse waves, longitudinal waves, and surface waves.
Burning oil and coal adds to the atmosphere.
A)phosphorous
B)carbon dioxide
C)oxygen
Answer:
carbon dioxide
Explanation:
a person drops apple from window and it takes about 5s to reach the ground. Determine the height of the wimdow from the ground
Answer:
122.5 m
Explanation:
Given:
Time taken by apple to reach ground (t) = 5 s
Acceleration of the apple is due to gravity (g) = 9.8 m/s²
The displacement of the apple is equal to the height of window (h) = ?
As the apple is dropped, the initial velocity is, [tex]u=0\ m/s[/tex]
Now, using Newton's equation of motion along the vertical direction that relates displacement, initial velocity, acceleration and time taken, we have:
[tex]h=ut+\frac{1}{2}gt^2[/tex]
Plug in the given values and solve for 'h'. This gives,
[tex]h=0+\frac{1}{2}\times 9.8\times 5^2\\\\h=4.9\times 25=122.5\ m[/tex]
Therefore, the height of the window above the ground is 122.5 m.
A student pushes on a crate with the force of 100 Newtons directed to the right. What force does the crate exert on the student? Note: It has to be done with the Newton's 2nd Law of Motion.
Answer: The Force exerted on the student by crate will be 100 N.
Explanation: As per the given Question student is trying to push the crate in right direction with the force of 100N.
And we know that, Newton's third law states that every action has equal and opposite reaction.
So from the Newton's 3rd law of motion it is very clear the student must be experiencing the same amount of force which he is applying.
Calculate the centripetal force on a 4.5 kg sensor that is attached at the end of a 90.0-m long wind turbine blade that is rotating at 1.00 rev/s.
Final answer:
The centripetal force on the sensor is 2544.06 N.
Explanation:
To calculate the centripetal force of on the sensor attached at the end of the wind turbine blade, we can use the formula:
F = m * r * ω²
Where F is the centripetal force, m is the mass of the sensor, r is the radius of the wind turbine blade, and ω is the angular velocity.
Substituting the given values, we have: F = 4.5 kg * 90.0 m * (2π rad/s).
After calculating, we get the centripetal force on the sensor to be 2544.06 N.
2. What is another term, one you'll find
on an iPod, for amplitude?
Answer:
volume
Explanation:
Another term for amplitude is height. The maximum displacement that a longitudinal wave, like the sound wave.
What is amplitude?The greatest movement of any point existing just on string from its location when the string would be at rest is used to determine the amplitude of a transverse wave, like the wave on such a string that's also plucked there. The maximum displacement that a longitudinal wave, like the sound wave, may make from its equilibrium position is used to determine the wave's amplitude.
A sound is a type of energy that's also created when objects vibrate. In most cases, a medium is necessary for the propagation of sound. As a result, we may conclude that sound cannot travel in a vacuum because there is nothing for the sound waves to travel through. Another term for amplitude is height.
Therefore, another term for amplitude is height.
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Mechanical energy that has been "lost" to friction has actually been
destroyed
O
A. True
OB. False
SUBMIT
help
Answer:
it false, APEX, i just did this one
Explanation:
Answer:
False
Explanation:
The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another.
A 0.90-kg block initially at rest on a frictionless, horizontal surface is acted upon by a force of 4.0 N for a distance of 3.0 m. How much farther would the force have to act for the block to have 61 J of kinetic energy?
Answer:
12 m
Explanation:
Work = change in energy
W = ΔE
Fd = ΔE
(4.0 N) d = 61 J
d = 15.25 m
Rounded to two significant figures, the distance the force would have to act over is 15 m, which is 12 m more than the 3.0 m it traveled.
Final answer:
To calculate the additional distance needed for the block to have 61 J of kinetic energy, we used the work-energy theorem and found that after applying a force of 4 N over 3 m, the kinetic energy is 12 J. An additional 49 J is needed, resulting in a requirement of an additional 12.25 m for the force to act upon.
Explanation:
To determine how much farther the force would have to act for the block to have 61 J of kinetic energy, we'll first use the work-energy theorem, which states that the work done on an object is equal to the change in its kinetic energy (KE). Initially, the block has 0 J of kinetic energy since it's at rest, and the work done by a constant force is W = F * d, where F is the force and d is the distance the force is applied over.
Since 4 N of force is applied over 3 m, the work done is:
W = 4 N * 3 m = 12 J
This means the kinetic energy of the block is now 12 J after the force has been applied for 3 m. To reach 61 J of kinetic energy, the block needs an additional:
KEneeded = 61 J - 12 J = 49 J
Now, we can find the additional distance (dadditional) required using the same work done equation:
49 J = 4 N * dadditional
dadditional = 49 J / 4 N = 12.25 m
Therefore, the force would have to act over an additional 12.25 m to give the block 61 J of kinetic energy.
5) Consider pushing a 50.0 kg box through a 5.00 m displacement on both a flat surface and up a
ramp inclined to the horizontal by 15.0°. In both cases, you apply a force of 100.N parallel to the
surface (parallel to the floor or parallel to the ramp). Calculate the work done by:
a) the gravitational force as the box is pushed across the flat ground
b) the gravitational force as the box is pushed up the ramp
c) the force you apply as the box is pushed across the flat ground
d) the force you apply as the box is pushed up the ramp
a) The work done by the gravitational force on the flat surface is zero
b) The work done by the gravitational force on the ramp is -634 J
c) The work done by the applied force on the flat surface is 500 J
d) The work done by the applied force on up along the ramp is 500 J
Explanation:
a)
The work done by a force is given by the equation
[tex]W=Fdcos \theta[/tex]
where
F is the magnitude of the force
d is the dispalcement of the object
[tex]\theta[/tex] is the angle between the direction of the force and of the displacement
In this problem, we want to calculate the work done by the gravitational force as the box is pushed across the flat ground.
We immediately notice that the gravitational force acts downward, while the displacement is horizontal: therefore, the angle between force and displacement is [tex]90^{\circ}[/tex]; this means that [tex]cos 90^{\circ}=0[/tex], and therefore, the work done is zero:
[tex]W=0[/tex]
b)
In this case, the box is pushed along the ramp. We have:
[tex]F=mg=(50.0)(9.8)=490 N[/tex] is the magnitude of the force of gravity, where
m = 50.0 kg is the mass of the box
[tex]g=9.8 m/s^2[/tex] is the acceleration of gravity
d = 5.00 m is the displacement of the box along the ramp
The ramp is inclined to the horizontal by [tex]15.0^{\circ}[/tex], therefore the angle between the force of gravity and the displacement of the box (moving up along the ramp) is:
[tex]\theta=90^{\circ}+15^{\circ}=105^{\circ}[/tex]
Therefore, the work done by gravity in this case is:
[tex]W=(490)(5.00)(cos 105^{\circ})=-634 J[/tex]
c)
In this case, we want to calculate the work done by the force you apply as the box is pushed across the flat ground.
Here we have:
F = 100.0 N (force applied)
d = 5.00 m (displacement of the box)
[tex]\theta=0^{\circ}[/tex] (the force is applied parallel to the flat surface, therefore force and displacement have same direction)
Therefore, the work done by the force you apply on the flat ground is:
[tex]W=(100.0)(5.00)(cos 0^{\circ})=500 J[/tex]
d)
In this last case, we want to calculate the work done by the force you apply as the box is pushed up along the ramp.
This time we have:
F = 100.0 N (force applied is the same)
d = 5.00 m (displacement of the box is also the same)
[tex]\theta=0^{\circ}[/tex] (the force is applied parallel to the ramp, therefore force and displacement have again same direction)
Therefore, the work done by the force you apply while pushing the box along the ramp is:
[tex]W=(100.0)(5.00)(cos 0^{\circ})=500 J[/tex]
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You are driving on a freeway and notice a small car (very small) cut off a big truck. Explain why it is a bad idea for the small car to cut off a very big truck?
Answer: small cars can stop and go fast big trucks can not
Explanation:
What is ohms law for science
Answer:
Explanation:
According to ohm's law
The current flowing through the wire is directly proportional to the potential difference applied across its ends , provided the temperature and other physical conditions of the wire like stresses and strains remains constant .
Which of the following describes the time over which a periodic wave repeats?
A. frequency
B. wavelength
C. amplitude
D. period
Answer:
C
Explanation:
i dont know im just guessing im way too young for this stuff
the time over which a periodic wave repeats describes as a time period.
What is a periodic wave?A wave with a recurrent pattern that controls its wavelength and frequency is called a periodic wave. The time it takes for a waveform to complete one cycle is referred to as a period, and the frequency is the number of cycles per second of time. It has amplitude, period, and frequency characteristics.
Frequency:
Frequency is the number of occurrences of a repeating event per unit of time.
Wavelength:
A waveform signal that is carried in space or down a wire has a wavelength, which is the separation between two identical places (adjacent crests) in consecutive cycles.
Amplitude (A):
The maximum displacement of a wave on either side of its mean position is called Amplitude.
Time Period (T):
The time taken to complete one vibration is called the Time period.
therefore, period describes the time over which a periodic wave repeats.
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A friend is making vegetable soup. he add some salt to the simmering broth. the salt dissolves, and your friend says the broth saltiness it’s just right. after two more hours of cooking on the stove top the broth is way too salty, what happened?
Answer:
It is due to the effect of temperature on our taste receptors.
Explanation:
The taste receptors on our tongue is extremely sensitive.It can vary the taste of same element due to difference in temperature. So cooking further, the temperature of that food is increased which makes it taste more saltier than before.The solubility may also have the effect on this case because solubility increases with the increase in temperature. So at high temperature salt may expand and dissolve more to make the food saltier than before.6) Consider a 10.0 kg block of wood that's released from rest at a distance 20.0m above the
ground and assume ground level is the point of zero gravitational potential energy. Calculate:
a) the initial gravitational potential energy of the block upon release
b) the translational kinetic energy of the block just before it hits the ground.
c) the translational kinetic energy of the block when it has fallen half the distance to the
ground.
d) the speed of the block when it has fallen half the distance to the ground.
Explanation:
a) Potential energy is weight times height.
PE = mgh
PE = (10.0 kg) (9.8 m/s²) (20.0 m)
PE = 1960 J
b) Energy is conserved. As the block falls, potential energy is converted to kinetic energy. Just before the block lands, all of the potential energy has been converted to kinetic energy.
KE = 1960 J
c) When the block has fallen half the distance, half the potential energy has been converted to kinetic energy.
KE = 1960 J / 2
KE = 980. J
d) Kinetic energy equals half the mass times the square of the velocity.
KE = ½ mv²
980. J = ½ (10.0 kg) v²
v = 14.0 m/s
What is the chemical formula of water?
A)N2O
B)H2O
C)NH3
D)HO3
Answer:
B H2O.
Explanation:
Because H2O stands for hydrogen, which has the amount of 2. And O stands for oxygen, which is by itself. When you put that together it makes H2O.
Mars has two moons, Phobos and Deimos, with masses 1.08 x 1016 kg and 1.8 x 1015 kg, respectively. How far apart
are the two moons when the gravitational force between them is 3 x 1012 N? Do not use scientific notation. Round
to one decimal
Answer:
20784.6m
Explanation:
Check attachment
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14. Looking ahead: Give an example of how the Law of Conservation of Energy applies to eating your favorite meal. Give at least 2 energy transformations.(5 pts)
Answer:
The law of conservation of energy applies to eating your favorite food in that the energy contained in the food is being converted to energy usable for the body system after the final digestion(Glucose or simple sugar, amino acid, etc)
Examples of transformation of energy include
(1) Transformation from Chemical energy in battery to light energy in bulb
(2) Transformation of Electrical energy to thermal/Heat energy in electric stove.
Explanation:
The law of conservation of energy states that energy can neither be created or distroy. It can only by converted from one form to another.
Final answer:
The Law of Conservation of Energy states that energy cannot be created or destroyed, but can be transformed. When eating your favorite meal, the chemical energy in the food is transformed into mechanical energy (chewing) and thermal energy (digestion).
Explanation:
The Law of Conservation of Energy states that energy cannot be created or destroyed, but it can be transformed from one form to another. This applies to eating your favorite meal because the food you eat contains chemical energy, which is then converted into other forms of energy as your body digests and metabolizes the food. Two examples of energy transformations in the process of eating your favorite meal are:
1. Chemical to Mechanical Energy: When you chew your food, the muscles in your jaw contract and expand, converting the chemical energy in the food into mechanical energy.
2. Chemical to Thermal Energy: As your body breaks down the food, chemical reactions take place, releasing heat energy in the form of thermal energy.
Using what you know about the periodic table, choose all of the correct answers,
Answer:
What are the choices?