what is physical effect​

Answer:

Sample Response: The data for the first part of the experiment support the first hypothesis. As the height of the cylinder increased, the temperature of the water increased. At a greater height, the cylinder has more gravitational potential energy. This gravitational potential energy was completely converted to thermal energy, which increased the temperature of the water.

Explanation:

this the sample response from ED mechanical equivalent of heat lab.

Answer:

Sample response:

Explanation:

The data for the first part of the experiment support the first hypothesis. As the height of the cylinder increased, the temperature of the water increased. At a greater height, the cylinder has more gravitational potential energy. This gravitational potential energy was completely converted to thermal energy, which increased the temperature of the water.

The velocity of the boxcar before the collision was 5.30 m/s. Let the empty freight car have a mass of m and let the fully loaded boxcar have a mass of 5.30m.

Let us denote the speed of the empty freight car before the collision as v1 and the speed of the boxcar before the collision as v2. Let the velocity of both the cars after the collision be v.

Conservation of momentum states that the momentum of a system remains constant if no external forces act on it. Therefore, we can equate the total momentum of the system before and after the collision.

Before the collision, the total momentum is:mv1 + 5.30m×0 = m × v

After the collision, the total momentum is:(m + 5.30m) × v.

Thus,mv1 = (m + 5.30m) × vV1 = (m + 5.30m) × v / m ————(1)

Now, let's assume that the two cars are at rest after the collision.

Therefore, the total momentum after the collision will be zero.

Thus, we get:(m + 5.30m) × v = 0v = 0.

This means the velocity of the two cars is zero after the collision.

Now, we need to find the velocity of the boxcar before the collision if the empty one was moving at 1.00 m/s.

We can use equation (1) to solve for v1.

Thus, we get:v1 = (m + 5.30m) × v / m= 5.30m × 1.00 m/s / m= 5.30 m/s.

Therefore, the velocity of the boxcar before the collision was 5.30 m/s.

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When you lock up your brakes' and start to slide, the type of friction that is present is kinetic friction. When a sliding or slipping motion occurs between two surfaces, the type of friction present is called kinetic friction.

Kinetic friction is also called dynamic friction because the objects are moving relative to each other. When you apply the brakes on a moving vehicle, the brakes apply a force that creates a frictional force between the brake pads and the wheels of the vehicle. When this frictional force is larger than the maximum static frictional force between the wheels and the road surface, the wheels start to slide, and kinetic friction comes into play. This is the type of friction that is present when you lock up your brakes and start to slide. On the other hand, when you have ABS brakes and you "lock them up," the type of friction that is present is still static friction. ABS or anti-lock brakes work by maintaining the maximum static frictional force between the wheels and the road surface, even when the brakes are applied with a lot of force. The system works by sensing when the wheels are about to lock up and releasing the brakes temporarily to reduce the frictional force between the brake pads and the wheels. This allows the wheels to rotate again before the brakes are applied again.

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Answer:

When a solid reaches the temperature of its melting point, it can become a liquid. For water, the temperature needs to be a little over zero degrees Celsius (0oC) for you to melt.

Explanation:

Internal residual stresses in metal components can arise from several sources during the annealing process. These sources are non uniform heating and cooling, phase transformations and plastic deformation.

Sources of internal residual stress are:

Adverse consequences of these residual stresses include:

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Answer:

D . A mass of 5 kilograms lifted 5 meters in 10 second

Answer:

Inertia.

Explanation:

Inertia can be defined as the tendency of an object or a body to continue in its state of motion or remain at rest unless acted upon by an external force.

In physics, Sir Isaac Newton's first law of motion is known as law of inertia and it states that, an object or a physical body in motion will continue in its state of motion at continuous velocity (the same speed and direction) or, if at rest, will remain at rest unless acted upon by an external force.

For example, the inertia of an object such as a shopping cart is greatly dependent or influenced by its mass; the higher quantity of matter in a shopping cart, the greater will be its tendency to continuously remain at rest.

Answer:

by movement of the bones of the middle ear and by differences in the surface area of the eardrum versus the oval window.

Explanation:

Answer:

1503 km

Explanation:

Distance is speed multiply times. We can express mathematically as:

\(\displaystyle{s = vt}\)

where s is distance, v is speed and t is time. We know that speed is 501 km/h and t is 3 hours. Therefore, substitute v = 501 and t = 3 in:

\(\displaystyle{s = 501 \ \, \sf{km/h} \cdot 3 \ \, \sf{hours}}\\\\\displaystyle{s = 1503 \ \, \sf{km}}\)

Therefore, the train will be able to reach 1503 km within 3 hours.

Answer:

A

Explanation:

magnifying = enlarging something or making it seem bigger

The potential energy is converted to the kinetic energy and transfered to the kids.

Potential energy is energy that is stored in an object or substance, this is based on the position, arrangement or state of the object or substance.

Kinetic energy is the energy an object has because of its motion. If we want to accelerate an object, then we must apply a force. After work has been done, energy has been transferred to the object, and the object will be moving with a new constant speed.

Energy is being converted from potential to kinetic energy, and the energy is being transferred to the kids when the water moves past them.

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Answer:

that the correct one is C

Explanation:

In relative motion problems, in this case the boat and the river, with respect to the land and between them, the most common questions are:

* What is the time to cross the river

* How far down does the boat go

* What direction the boat must have to reach the opposite shore

examining the answers we see that the correct one is C

11.The time at 75° East longitude would be 1 hour and 20 minutes behind. 12.The time at 135° degrees East longitude would be 4 hours ahead. and 13. the time in Lima, Peru (15° South latitude, 75° West longitude) would also be 9:30 AM.

At 2:00 AM at 90° East longitude, the time at 75° East longitude would be 1 hour and 20 minutes behind. This is because for every 15 degrees of longitude, there is a time difference of approximately 1 hour. Since the two longitudes in question have a difference of 15 degrees, we can divide this by 15 to calculate the time difference.

If it is 8:00 PM at 15° East longitude, the time at 135° East longitude would be 4 hours ahead. Similarly, for every 15 degrees of longitude, there is an approximate time difference of 1 hour. Since the two longitudes in question have a difference of 120 degrees, we can divide this by 15 to calculate the time difference.

There is a 7-hour difference** between 105° West longitude and the Prime Meridian (0° longitude). The Prime Meridian, passing through Greenwich, England, serves as the reference point for determining time zones. As one moves westward from the Prime Meridian, each 15 degrees of longitude corresponds to a time difference of approximately 1 hour. Therefore, the time at 105° West longitude would be 7 hours behind the time at the Prime Meridian.

If it is 9:30 AM in New York (41° North latitude, 75° West longitude), the time in Lima, Peru (15° South latitude, 75° West longitude) would also be 9:30 AM. The latitude does not affect the time difference between the two locations. However, since both locations have the same longitude (75° West), they would experience the same local time. The time difference between different latitudes is primarily significant for determining time zones rather than the actual time within a specific time zone.

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Answer:

Density= 2.78 g/cm³

Relative density=2.8

Explanation:

To calculate the density of the cube we have to use the formula ρ=mass/volume

ρ stands for density.

So now we don't have the volume of the cube and to find the volume of the cube we have to use the formula a³

3³= 9 cm³

Now plug in the values. ρ= 25 g/9 cm³

ρ= 2.78 g/cm³

To find the relative density, we have to use the formula ρsample/ρH20

The sample means the density of the substance earlier. We do not know the density of water but it is constant at 997 kg/m³.

Now we have to make the units same so you change the unit of the density of cube to kg/m³

So, 25/1000= 0.025 kg

9/100×100×100 (because cm³ which means that there should be 3 meters to change the unit and to conver cm to meter we need to divide by 100 so 9cm/100, 9cm²/100×100, 9cm³/100×100×100)

=0.000009 m³

The new density= 0.025 kg/ 0.000009 m³

= 2777.78 kg/m³

Now plug the values into the formula:

relative density= 2.777.78 kg/m³ / 997 kg/m³

=2.8

There is no unit since kg/m³ and kg/m³ cancels

Answer:

Explanation:

The force of static friction acting on the box is the frictional force;

Frictional force Ff = Wsin theta (force acting along the ramp)

W is the gravitational force known as the weight

Ff = 112.1sin42°

Ff = 112.1(0.6691)

Ff = 75.00N

Hence he force of static friction acting on the box  if box has a gravitational force of 112.1 N id 75.00N

Answer:

75N i did test

Explanation:

Answer:

Explanation:

According to newtons second law.

F = mass * acceleration

If the doll has a mass of 0.2 kg, and the robot has a mass of 0.5 kg, the resulting mass will be 0.7kg

Force applied = 1N

acceleration = Force/mass

Substitute the values and get acceleration

acceleration = 1/0.7

acceleration = 1.43m/s²

Hence the magnitude of the acceleration of the robot is 1.43m/s²

Answer:

Sun's Gravitational Pull

Explanation:

Planets revolve around the sun because of the Sun's gravitational pull pulling all the planets to revolve around it.

ah=d=75m= 0.15s A B C Hola cómo estás das que ases de bueno amiga

The static friction coefficient is higher than the kinetic friction coefficient.

What is static friction?

Friction is the obstruction or resistance that prevents one solid object from rolling or sliding over another. F indicates this. Any solid and liquid layer motion is opposed by a force. When two materials slide over one another, this force is created. There is friction all around us. For instance, when we walk, the ground is in contact with our feet. When we walk, one foot advances while the other moves backward, applying pressure to the ground. When this force is applied to the ground, the ground applies an equal and opposing force to our feet. One of the laws of motion is being followed in this situation.

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The specific heat of Al is greater than that of water. Therefore, adding Al wire will increase the temperature of water in the calorimeter. While adding the Pb pellets will decrease the temperature.

Calorimetry is an analytical technique used to determine the heat energy absorbed or released by a system. The calorimetric equation connecting the heat change q with mass of the substance m, specific heat capacity c and the temperature difference ΔT is:

q = m c ΔT

The specific heat of a substance is the heat energy required to increase the temperature by one degree Celsius per one gram. Higher the specific heat, higher be the rate of cooling or heating.

The heat gained by water from steel will be greater than that of Al because specific heat of steel is greater. Lead has very small specific heat and the temperature change will be smaller.

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Answer:

aluminum wire = 2.6c

steel wire = 1.5c

lead pellets = 0.8c

Explanation:

The total magnification of a compound light microscope is calculated by multiplying the power of the objective lens by the power of the eyepiece.

The objective lens is the lens closest to the object being viewed, while the eyepiece is the lens closest to the eye of the observer. The power of the objective lens is typically marked on the lens itself and ranges from 4x to 100x or more. The power of the eyepiece is also marked on the lens and is typically 10x.

To calculate the total magnification, simply multiply the power of the objective lens by the power of the eyepiece. For example, if the objective lens has a power of 40x and the eyepiece has a power of 10x, the total magnification would be 40 x 10 = 400x.

It is important to note that magnification alone does not determine the quality of an image in a microscope. Other factors such as resolution, contrast, and depth of field also play important roles in producing a clear and detailed image.

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Earth has an albedo of about 30 percent, reflecting much of the sun's radiation back into space.

The energy that the Sun emits into space in the form of electromagnetic waves is known as solar radiation. This energy, which the Sun's surface emits, affects climatological and atmospheric processes.

With an albedo of roughly 30%, the Earth's surface reflects back into space 30% of the solar radiation instead of absorbing it. Higher numbers denote higher reflectivity, while albedo, which is represented as a percentage, refers to the reflectivity of a surface. By reflecting part of the sun's energy back into space and preventing the surface from scorching, Earth's albedo helps control the planet's temperature. This is essential for supporting life on Earth and helps maintain a stable climate.

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The complete question -

Earth has an _______ of about 30 percent, reflecting much of the sun's radiation back into space.

Answer:

The force exerted by one source object on another target object always creates another force at the target object that pushes back on the source object with the same ... or His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A.

Answer:

Galileo discovered that objects that are more dense, or have more mass, fall at a faster rate than less dense objects, due to this air resistance. A feather and brick dropped together. Air resistance causes the feather to fall more slowly.

Answer:

\(v = 14.78m/s\)

Explanation:

Given

\(KE = 150J\)

\(p = 20.3kgm/s\)

Required

Determine the object's speed

Kinetic Energy is calculated as:

\(KE = \frac{1}{2}mv^2\)

Make m the subject

\(m = \frac{2KE}{v^2}\)

Momentum is calculated as:

\(p = mv\)

Make m the subject

\(m = \frac{p}{v}\)

So, we have:

\(m = \frac{p}{v}\) and \(m = \frac{2KE}{v^2}\)

Equate both expressions: \(m = m\)

\(\frac{2KE}{v^2} = \frac{p}{v}\)

Multiply both sides by v

\(v * \frac{2KE}{v^2} = \frac{p}{v}*v\)

\(\frac{2KE}{v} = p\)

Make v the subject

\(v = \frac{2KE}{p}\)

Substitute \(KE = 150J\) and \(p = 20.3kgm/s\)

\(v = \frac{2 * 150}{20.3}\)

\(v = \frac{300}{20.3}\)

\(v = 14.78m/s\)

To use all the energy from consuming a small order of french fries, the person would need to climb the 11.0 m stairway approximately 17.0 times.

The energy content of the small order of french fries is given as 241.0 Cal. We can convert this value to joules since the unit of energy in the metric system is the joule (J). 1 calorie (Cal) is equal to 4.184 joules (J). To use all the energy from consuming a small order of french fries, the person would need to climb the 11.0 m stairway approximately 57 times.

Energy content of the small order of french fries:

241.0 Cal × 4.184 J/Cal = 1007.144 J

Work done to climb the stairway:

(55.0 kg) × (11.0 m) × (9.8 m/s²) = 59294 J

Number of climbs needed to use all the energy:

1007.144 J ÷ 59294 J ≈ 17.0

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Answer:

4,312 J

Explanation:

PE = mgh

= 44(9.8)(10)

= 4,312

The longest wavelength of electromagnetic radiation that will eject photo-electron from the sodium metal is 544 nm.

Electromagnetic radiation consists of waves of electromagnetic field, which propagates through space and carries momentum and electromagnetic radiant energy.

Minimum energy required to knock out an electron from the surface of the metal is called the work function.

As we know that, W= hc/λ

h -- Planck's constant ; c -- Speed of light

and λ is Longest wavelength

Given, work function of sodium metal is 2.28 eV

As 1 eV = 1.6021 * 10^-19 J

=2.28 * 1.6021 * 10^-19

= 3.65 *10^-19 J

W= hc/ λ

3.65 *10^-19 = 6.62 *10^-34 * 3 *10^8/ λ

λ = 5.44 * 10 ^-7m

λ =544 nm

The longest wavelength of electromagnetic radiation that will eject photo-electron from the sodium metal is 544 nm.

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