A transfer of heat within a liquid or gas that involves warm particles moving in currents isa convection.
b connection.
c correction.
d conduction.

Answers

Answer 1

Answer: So the question is what is a transfer of heat within a liquid or gas that involves warm particles moving in currents. So there are three mechanisms of moving heat. Those are convection, conduction and radiation. Radiation is transfering energy via electromagnetic waves. Conduction is transfering heat trough some thermal conductor. Convection is transferring heat within a liquid or gas that involves warm particless moving in currents.

Answer 2

Answer:

THE ANSWER IS

A; convection.

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How do liquid water , ice and water vapor differnt from eachother

Click to select the correct answers. Click again to unselect answers. Leave the incorrect answers unselected.What do you know about the law of conservation of energy? Check all the statements that are true according to this law.

The total amount of mass in a system remains constant regardless of the changes that take place in that system.
Energy is neither created or destroyed; it only changes form.
Half-way down the ramp, PE = 50J and KE = 50J.
In this energy pyramid, all the energy from level is transferred to the next level.
In a closed system, i.e., a system that isolated from its surroundings, the total energy of the system is conserved.

Answers

All the statements regarding law of conservation of energy are true except for statement 2 stating energy changes half way down the ramp.

What is law of conservation of energy?

According to law of conservation of energy, it is evident that energy is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.

Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Julius Robert Mayer in the year 1842.Energy of an isolated and closed system remains constant.

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Answer:energy

Halfway

In a closed system..3

Explanation:

Calculate the gravitational potential energy of a 10kg box on the top shelf of a closet, 2m above the floor

Answers

Answer:

196 J

Explanation:

PE = mgh

PE = (10 kg) (9.8 m/s²) (2 m)

PE = 196 J

What are 4 things that can happen to a light wave when it hits an object?

Answers

Explanation:

The four things that can happen to a light wave when it hits an objects are :

1. Reflection : The bouncing back of light when the light wave strikes on a surface is called reflection of light.

2. Refraction : The bending of light when the light wave moves from one medium to another.

3. Absorption : Absorption is the process in which the light wave do not reflect back. It stays inside the material.

4. Transmission : Transmission of light is the process in which light wave goes continuously straight.

Some other process that are shown by a light wave are polarization, scattering etc.

Final answer:

When a light wave hits an object, it can undergo reflection, transmission, absorption, or scattering.

Explanation:

When a light wave hits an object, several things can happen:

Reflection: The light wave can bounce off the object, changing its direction but maintaining its frequency and speed.
Transmission: The light wave can pass through the object, with some of the wave being absorbed and some being transmitted.
Absorption: The light wave can be absorbed by the object, converting its energy into heat.
Scattering: The light wave can be scattered in different directions by the object, leading to a change in the overall direction of the wave.

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Why does friction increase as speed INCREASES?Please explain using the big idea of particles

Answers

Explanation:

Frictional force is an opposing force or a drag force. It is given by :

$F=\mu N$

Where

μ is the coefficient of friction

N is the normal force

We know that the product of mass and the acceleration is called the force acting on the object. This means as the speed of the object increases, its drag force increases exponentially.

When the speed of an object increases, the attraction between the particles increases. Hence, the frictional drag increases.

Due to a number of variables, friction is worse as speed gets faster. The production of heat as a result of enhanced molecularinteraction is one of the key causes.

The frequency and force of surface molecule collisions increase as an object's velocity against another object increases, producing more heat.

This rise in temperature increases the stickiness or adhesion between the surfaces, which makes moving objects more difficult. Higher speeds can result in more pronounced relative movement of surface imperfections and microstructures, increasing interlocking and frictional forces.

Thus, as speed increases, friction increases due to a mixture of increased heat generation, adhesion, and interlocking effects.

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student built a simple heat engine that could lift masses. If the heat engine takes in 300 J of heat and loses 50 J to the environment, how much height will it lift a 1.5 kg mass?

Answers

Answer:

So it will lift the mass by h = 17 m

Explanation:

As per energy conservation we know that

$Q_1 = W + Q_2$

here we know that

$Q_1 = 300 J$

$Q_2 = 50 J$

now we have

$W = 300 - 50$

$W = 250 J$

so work done by the engine is 250 J

now we have

$W = mgh$

$250 = 1.5 * 9.81 * h$

$h = 17 m$

A 4.8-kilogram ball moving at 8 m/sec to the right collides with a 1.4-kilogram ball at rest. After the collision, the 4.8-kilogram ball moves at 4.8 m/sec to the right. What is the velocity of the 1.4-kilogram ball?m/s

Answers

The final velocity of the 1.4 kg ball is 11.0 m/s to the right

Explanation:

We can solve this problem, by using the law of conservation of momentum: in fact, the total momentum of the two balls must be conserved before and after the collision. Therefore, we can write:

$p_i = p_f\nm_1 u_1 + m_2 u_2 = m_1 v_1 + m_2 v_2$