The equivalent resistance of a complex circuit is usually determined by

Answer:

1-A

2-C

3-C

4-A

Explanation:

1.   waves

2.   visible light

3.   visible light

4.   bends

1. The electromagnetic spectrum contains many types of waves.

A) waves B) Objects C) Particles

An electromagnetic spectrum has frequency, from lowest to highest frequency, therefore including all radio waves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.

2. The colors we see are all part of visible light.

A) X rays B) UV waves C) visible light

The light we are able to see is called the visible light spectrum, which ranges from violet light, having a wavelength of approx. 400 nanometers, to red light, having a wavelength of around 650-700 nanometers.

3. We can see because of visible light.

A) UV waves B) infrared light C) visible light

We are able to see because of the sunlight striking an object and reflecting back which moves through space and reaches our eyes.

4. When visible light passes through a prism or a drop of water, the light bends and we see a rainbow of color.

A) Bends B) Reflects C) Bounces

The rainbow effect occurs because when light strikes a water droplet, it is refracted at the boundary of air and water, and enters the droplet, where the light is dispersed into the seven colors, the light is then reflected inside the droplet and finally refracted out again into the air.

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Answer: 0.057 kg

Explanation:

We can find the mass of the oil if we know its density and the volume it occupies. Since the density [tex]\rho[/tex] is a relation between the mass [tex]m[/tex] and the volume [tex]V[/tex] of a substance:

[tex]\rho=\frac{m}{V}[/tex] (1)

Now, the density of oil is generally between [tex]700 \frac{kg}{m^{3}}[/tex] and [tex]950 \frac{kg}{m^{3}}[/tex]. However, in this case we will take [tex]950 \frac{kg}{m^{3}}[/tex] as its density.

In adition, we are given as data the volume thw oil occupies:

[tex]V=60 cm^{3} \frac{1 m^{3}}{(100 cm)^{3}}=6(10)^{-5} m^{3}[/tex]

Writing these values in (1):

[tex]950 \frac{kg}{m^{3}}=\frac{m}{6(10)^{-5} m^{3}}[/tex] (2)

Isolating [tex]m[/tex]:

[tex]m=0.057 kg[/tex] This is the mass of the oil

Answer:

270J

Explanation:

Work = force x distance

Force =90N

Distance =3m

Work = 90 x 3

Work = 270J

P. E= 270J

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The work needed to lift the 90-N block of ice 3 m vertically is 270 J, and the block possesses 270 J of potential energy.

Work Done: To calculate the work done in lifting a 90-N block of ice 3 m vertically, you use the formula: Work = force x distance. So, Work = 90 N x 3 m = 270 J. The potential energy (PE) of the block at that height is equivalent to the work done, so the block has 270 J of potential energy.

Answer:

a) P =392.4[Pa]; b) F = 706.32[N]

Explanation:

With the input data of the problem we can calculate the area of the tank base

L = length = 10[m]

W = width = 18[cm] = 0.18[m]

A = W * L = 0.18*10

A = 1.8[m^2]

a)

Pressure can be calculated by knowing the density of the water and the height of the water column within the tank which is equal to h:

P = density * g *h

where:

density = 1000[kg/m^3]

g = gravity = 9.81[m/s^2]

h = heigth = 4[cm] = 0.04[m]

P = 1000*9.81*0.04

P = 392.4[Pa]

The force can be easily calculated knowing the relationship between pressure and force:

P = F/A

F = P*A

F = 392.4*1.8

F = 706.32[N]

a). The pressure that lies on the base would be:

[tex]P =392.4[Pa][/tex]

b). The thrust that exists on the base would be:

[tex]F = 706.32[N][/tex]

a). Given that,

Length of the rectangular vessel [tex]= 10m[/tex]

The Breadth of the rectangular vessel [tex]= 18cm or 0.18m[/tex]

Area of the vessel [tex]= L[/tex] × [tex]B[/tex]

[tex]= 10[/tex] × [tex]0.18[/tex]

[tex]= 1.8m^2[/tex]

To find the pressure,

Pressure(p) = Density × g × h

With

Density [tex]= 1000 kg/m^3[/tex]

Gravity(g) = [tex]9.81m/s^2[/tex]

Height(h) = [tex]4 cm[/tex] or [tex]0.04m[/tex]

So,

P [tex]= 1000[/tex] × [tex]9.81[/tex] × [tex]0.04[/tex]

∵ [tex]P = 392.4[/tex]

b). Since,

Pressure [tex]= F/A[/tex]

⇒ [tex]F = P[/tex] × [tex]A[/tex]

⇒ [tex]F = 392.4[/tex] × [tex]1.8[/tex]

∵ Thrust or Force [tex]= 706.32 N[/tex]

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Option D

The resistance in machine is 8.5 ohms

Solution:

Given that,

Power = 1700 W

Voltage = 120 V

We have to find the resistance in machine

The formula used is:

[tex]P = \frac{V^2}{R}[/tex]

Where,

"P" is the electric power and "V" is the voltage and "R" is the resistance

Substituting the given values we get,

[tex]1700 = \frac{120^2}{R}\\\\1700 = \frac{14400}{R}\\\\R = \frac{14400}{1700}\\\\R = \frac{144}{17}\\\\R = 8.47 \approx 8.5[/tex]

Thus resistance in machine is 8.5 ohms

Answer:

AB 15×15=225

A<B false because A=B

the answer is c because A=B

The frequency of a  wave oscillates 5.0 times a second and has a speed of 4.0m/s is F=5Hz

Question Parameters:

A wave oscillates 5.0 times a second and has a speed of 4.0m/s

Generally, the equation for the Frequency is mathematically given as

F=v/\lambda

Or

F=1/T

Therefore

Frequency is simply the amount of times the wave oscillates

In conclusion, The frequency of the wave is

F=5Hz

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Final Answer:

The frequency of the wave is 5.0 Hz.

Explanation:

The frequency of a wave is the number of oscillations it makes per second. In this case, the wave oscillates 5.0 times a second, so the frequency is 5.0 Hz. The frequency of a wave is a fundamental characteristic determined by the number of oscillations it completes in one second. This measurement, expressed in hertz, represents the cycles or oscillations per second. It is a crucial parameter in understanding wave behavior and is essential in various fields such as physics, telecommunications, and engineering. The relationship between frequency, speed, and wavelength is described by the wave equation, where frequency and speed are inversely proportional.

Answer:

B. 150 minutes per week

Explanation:

American Heart Association suggests at least 150 minutes per week of moderate-intensity aerobic activity to adults.

Answer:

Gravity, or B should be placed in the Cell labeled “X”

Explanation:

2021, Edge

Gravity is the type of force should she place in the cell marked X.

Gravity is the type of force should she place in the cell marked X.

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Answer:

Thermal energy is the part of internal energy that is capable of being transferred to other objects.

Explanation:

Thermal energy is capable of being transferred until the objects become the same temperature, called equilibrium.

The best description of the relationship between internal energy and thermal energy is thermal energy is the portion of internal energy that can be transferred. The correct option is d.

The energy present in a system that determines its temperature is referred to as thermal energy. Thermal energy flows as heat. Thermodynamics is a whole field of physics that studies how heat is transmitted between various systems and how work is performed in the process.

Heat is the component of thermal energy that may be transferred, and heat is the energy that moves within. In thermodynamics, the internal energy is a property or state function that characterizes a substance's energy in the absence of capillary effects and the impacts of external magnetic, electric, and other fields.

Therefore, the correct option is d, Thermal energy is the portion of internal energy that can be transferred.

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The final velocity is 40 m/s. The box will undergo a displacement of 200 m over the period of 10 s.

Answer:

Explanation:

So the net force acting on the box of books will be the difference of normal force and frictional force acting on the box. As the normal force acting on the box is 40 N and the frictional force is 16 N, then the net force is

Net force = 40 N - 16 N = 24 N.

Also, the mass of the box is given as 6 kg. So as per second law of motion, the acceleration can be found by ratio of net force to mass of the object.

Acceleration of the box = Net force/Mass = 24/6=4 m/s².

Then velocity can be determined using the first equation of motion.

v = u + at =0 + (4× 10 s) = 40 m/s.

So the final velocity is 40 m/s.

Similarly, by using the second equation of motion,

s = ut +1/2 at²

s = (0×10)+(0.5×4×10×10)=200 m

And so, the box will undergo a displacement of 200 m over the period of 10 s.

Answer:

D_momentum = 3.23[kg*m/s]

Explanation:

The change of moment can be easily determined by applying the principle of momentum and amount of movement

initial data are:

[tex]m_{1}=0.17[kg]\\ m_{2}=0.17[kg]\\v_{1}=54[m/s]\\v_{2}=35[m/s]\\D_{momentum}= m_{1}*v_{1}-m_{2}*v_{2}\\D_{momentum}=0.17(54-35)\\D_{momentum}= 3.23[kg*m/s][/tex]

Given values,

Mass,

Velocity,

We know,

→ [tex]D_{momentum } = m_1\times v_1-m_2\times v_2[/tex]

By putting the values,

                     [tex]= 0.17\times 54-0.17\times 35[/tex]

                     [tex]= 0.17(54-35)[/tex]

                     [tex]= 0.17\times 19[/tex]

                     [tex]= 3.23 \ kg.m/s[/tex]

Thus the above approach is right.                

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Answer:

Molecules speed up

Explanation:

This is caused because of the temperature increasing. The temperature increase is telling us that the thermal energy of the reaction is increasing. When the energy is increased molecules increase their speed, because they have more energy in them

Answer:

Molecules speed up

Explanation:

Final answer:

To raise the temperature of 50.0 grams of water by 10.0 degrees Celsius, 2092 joules of energy are required, calculated using the specific heat capacity formula where the specific heat capacity of water is 4.184 J/g°C.

Explanation:

To calculate how much energy is required to raise the temperature of 50.0 grams of water by 10.0 degrees Celsius, we use the specific heat capacity formula:

q = mcΔT

where:

Substituting the given values:

q = (50.0 g) x (4.184 J/g°C) x (10.0 °C)

q = 2092 J

Therefore, it requires 2092 joules of energy to raise the temperature of 50.0 grams of water by 10.0 degrees Celsius.

The spring has been stretched 0.701 m

Explanation:

The elastic potential energy of a spring is the potential energy stored in the spring due to its compression/stretching. It is calculated as

[tex]E=\frac{1}{2}kx^2[/tex]

where

k is the spring constant

x is the elongation of the spring with respect to its equilibrium position

For the spring in this problem, we have:

E = 84.08 J (potential energy)

k = 342.25 N/m (spring constant)

Therefore, its elongation is:

[tex]x=\sqrt{\frac{2E}{k}}=\sqrt{\frac{2(84.08)}{342.25}}=0.701 m[/tex]

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Answer:

the answer is

B)It was the first planet located through mathematical calculations

The correct answer to the question is B) It was the first planet located through mathematical calculations. Neptune's discovery is unique because it was the first planet located through mathematical calculations, based on the gravitational effects observed in Uranus' orbit. This innovative approach was a monumental achievement in astronomy.

What is unique about Neptune's discovery? The unique aspect of Neptune's discovery lies in its method. Neptune was the first planet located not by direct observation but through mathematical calculations. This groundbreaking approach marks Neptune's discovery as a significant achievement in the field of astronomy.

The deviation in Uranus' orbit puzzled astronomers. This irregularity was attributed to the gravitational pull of an unknown planet, later identified as Neptune. Following these calculations, Neptune was discovered in 1846, right where it was predicted. This method of discovery, using the principles of gravitational theory and mathematical predictions rather than direct observation or accidental sighting, set Neptune apart from the discoveries of other planets.

Answer:

Therefore the depth in the ocean at which the presser is three times atmospheric presser is 20.15 m.

Explanation:

The pressure at some depth

[tex]P=P_\circ +\rho gh[/tex]  

[tex]P_\circ=[/tex] atmospheric presser = [tex]1.013\times 10^5[/tex] Pa

[tex]\rho=[/tex] density of the sea [tex]= 1025 kg / m^3[/tex]

g = gravity = 9.81 m/s²

h = depth of the ocean

P= atmospheric presser at depth = [tex]3P_\circ[/tex]

Therefore

[tex]3P_\circ=P_\circ +\rho gh[/tex]

[tex]\Leftrightarrow \rho gh=2P_\circ[/tex]

[tex]\Leftrightarrow h=\frac{2P_\circ}{\rho g}[/tex]

[tex]\Leftrightarrow h=\frac{2 \times 1.013 \times 10^5}{1025 \times 9.81}[/tex]

[tex]\Leftrightarrow h= 20.15[/tex]

Therefore the depth in the ocean at which the presser is three times atmospheric presser is 20.15 m.

Answer: a curved line

Explanation: a straight line indicates that the object is moving at a constant velocity because it has one slope, but a curved line on a distance-time graph indicates that the velocity is constantly changing because the slope is changing, which is acceleration. the line could be curved in any direction, as long as it shows a change in slope.

Final answer:

A curved line on a distance vs. time graph indicates that the object is accelerating. For constant acceleration, this curve will be parabolic. Acceleration is the slope of the tangent on the velocity vs. time graph derived from the distance-time graph.

Explanation:

On a distance vs. time graph, an object that is accelerating will not have a straight line but rather a curved line. This curve represents the change in speed over time. If the object is speeding up, the curve will be getting steeper, which indicates positive acceleration. In the case of constant acceleration, the distance-time graph is a parabola. The acceleration can be determined from the slope of the velocity vs. time graph, which in turn can be derived as the derivative of the position function from the distance-time graph. In conclusion, an accelerating object will be represented by a curved line on a distance vs. time graph, with the curvature indicating the acceleration's direction and magnitude.

Answer:

The correct answer is A.

Explanation:

A greater mass means a greater gravitational pull. To give Sphere C more gravitational pull you mus increase its mass

Effect of increasing the wavelength of an  electromagnetic wave

Explanation:

1.Wavelength = speed of light/frequency.

2.The frequency of an electromagnetic wave increases as wavelength decreases.

3.As wavelength decreases (and frequency increases) energy increases.

4.When frequency increases more wave crests pass a fixed point each second. That means the wavelength shortens. So, as frequency increases, wavelength decreases. The opposite is also true—as frequency decreases, wavelength increases.

Answer:

Energy decrease

Explanation:

While frequencies increase, energy increase

while wavelength increase, energy decrease

- The net force is greatest at the position of maximum displacement

- The net force is zero when at the equilibrium position

Explanation:

The motion of a spring is a Simple Harmonic Motion, in which the displacement of the end of the spring is given by a periodic function of the form

[tex]x=Asin (\omega t)[/tex]

where A is the amplitude (the maximum displacement), and [tex]\omega[/tex] the angular frequency of the motion.

We can analyze the net force acting on the spring by looking at Hooke's law:

[tex]F=kx[/tex]

where

F is the net force

k is the spring constant

x is the displacement

From the equation, we notice immediately that:

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Answer:

An illustration of a mass on a vertical spring with a transverse wave showing the position of the mass on the spring will make a transverse wave shape if bouncing up and down and moving horizontally. The shortest spring has the mass at the top of each crest and are labeled A and E respectively. The position where the mass in in the trough of the transverse wave would be labeled C and stretches the spring the farthest. The middle length springs has masses where the equilibrium of the material of the medium containing the transverse wave would be at the equilibrium of the material would be and are labeled B and D.

At which point(s) is the net force the greatest?

A,C, and E

At which point(s) is the net force zero?

B and D

Explanation:

Got it from engenuity

Answer:

Imp = -4 [kg*m/s]

Explanation:

To determine the impulse we must know the initial speed and final velocity of the ball, that is before and after hitting the wall. As these data are given in the input information, we can very easily find the value of the impulse given during the hit on the wall.

[tex]m*v_{1}+Imp=mv_{2} \\Imp= m*v_{2}-m*v_{1}\\Imp = (2*4)-(2*6)\\Imp = -4[kg*\frac{m}{s} ] \\[/tex]

The negative sign means that the impulse is given in the opposite direction to the one that the ball was thrown.

Yes, Water and wind can change the shape of a mountain through the process of erosion. The mountains' sharp peaks and edges evolve from these erosive forces rather than their initial formation. In contrast, the Moon's mountains remain smooth because of the lack of water and wind erosion.

Yes, water and wind can indeed change the shape of a mountain. Through the process of erosion, elements such as water and ice weather the rocks of mountain ranges, reshaping their profiles over time. For instance, the sharp peaks and serrated edges of mountains are not the direct result of the forces that initially upthrust the crust to form the ranges; instead, these features develop from erosional processes that gradually tear down the mountains. Ice erosion, in particular, acts as a powerful sculptor of mountainous terrain.

Additionally, mountain grasses are influenced by strong winds, which can bend them and alter the landscape over time. During different times of day, mountain-valley winds occur due to temperature variations that cause air to rise or fall along mountain slopes, which can also impact the mountain's shape gradually. The same is true for ocean waves, which wear away the land and change the shapes of coastlines. The formation of the 'The Wave' at Vermillion Cliffs, along the Utah and Arizona border, is an example of how erosion by water and wind can sculpt landforms.

Contrasting with the earth, the Moon provides an example of how mountains look when they are not sculpted by these erosive forces. The Moon's highlands have a smooth and dulled appearance due to the absence of water and wind erosion, offering a stark comparison to Earth's dynamic erosive processes.

Answer:875joules

Explanation:

If an object has a density greater than the liquid in which it is placed it will sink.

Explanation:

Density of the object can be known by its mass and volume.

If two objects have same volume but different masses it means the one having more mass will have higher density. Density is amount of mass per unit volume.

Objects that are tightly packed have higher density.

According to Archimedes' principle when a body is fully immersed that an upward buoyant force is equal to weight of the fluid that object displaces.

Objects with a greater density than a surrounding liquid will sink while objects with a lesser density will float, as explained by Archimedes' Principle.

If an object has a density greater than the liquid in which it is placed, it will sink. This can be explained by Archimedes' Principle, which suggests that an object's buoyancy or tendency to float is determined by the relative densities of the object and the fluid it is in. The denser an object is, the more weight it has for its size, which means it is less buoyant and more prone to sinking than floating.

For example, if you drop a stone (denser) in a pond, it will sink because its density is greater than that of water. On the other hand, ice, which is less dense than water due to its molecular structure, will float.

Alternatively, objects with a density less than the liquid they are placed in will float, like oil on water, hot air balloons in the atmosphere, or bits of cork in wine. This is because they displace more fluid weight than their own, creating a buoyant force that exceeds their own weight.

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Answer:

a: radiation

b: convection

c: conduction

Explanaa:tion:

Answer:

(D) eight

Explanation:

In carbon dioxide (CO2), there are two oxygen atoms for each carbon atom. Each oxygen atom forms a double bond with carbon, therefore the molecule is formed by two double bonds. Two double bonds means that the total number of electrons being shared in the molecule is. eight.