1.What is the law of conservation of mechanical energy?
The law of conservation of mechanical energy states that the total mechanical energy of an isolated system is constant.
2.What are the three types of energy?
The three types of energy are kinetic energy, potential energy, and thermal energy.
3.What is the difference between potential energy and kinetic energy?
Potential energy is energy that is stored and can be used later. Kinetic energy is energy that is being used.
4.How can you calculate the mechanical energy of an object?
The mechanical energy of an object can be calculated by multiplying the object’s mass by its velocity squared.
5.What are some examples of potential energy?
potential energy is the energy that an object has because of its position or condition
-a boulder at the top of a hill has potential energy because it has the potential to roll down
-a battery has potential energy because it has the potential to release electrical energy
-a dam has potential energy because it has the potential to store water
6.What are some examples of kinetic energy?
examples of kinetic energy are when you are running, when you are jumping, when you are skating, or when you are biking.
7.What happens to the energy when a system is in equilibrium?
The system’s energy is constant.
8.How can you transfer energy between two objects?
You can transfer energy between two objects by transferring the energy between the two objects’ centers of mass.
9.What is an example of a closed system?
A closed system is an isolated system in which there is no interchange of matter with its surroundings.
10.What is an example of an open system?
An example of an open system is the Earth’s climate.
11.What is an example of non-conservative force?
An example of non-conservative force is friction.
12.What is an example of conservative force?
An example of a conservative force is the force of gravity.
13.What is an example of dissipative force?
An example of dissipative force is air resistance.
14.What is an example of energy conversion?
The energy conversion of gasoline to motion in an engine is an example of the conversion of one form of energy to another.
15.What are some common energy forms?
Some common energy forms are thermal energy, light energy, electrical energy, and chemical energy.
16.How is energy converted from one form to another?
There is no single answer to this question as the conversion of energy from one form to another can happen in a variety of ways. However, some common methods of energy conversion include heat transfer, mechanical work, and the use of fuels.
17.What is an example of an irreversible process?
An irreversible process is one that cannot be reversed. For example, when a metal object is heated and then cooled, the metal will be harder than it was before.
18.What is an example of a reversible process?
Solid to liquid, liquid to gas, gas to liquid, solid to gas.
19.What is entropy?
Entropy is a measure of the disorder of a system.
20.What is the second law of thermodynamics?
The second law of thermodynamics is the law of entropy. It states that the entropy of an isolated system always increases over time.
21.What is the Carnot cycle?
The Carnot cycle is a theoretical cycle that describes the maximum possible efficiency of a heat engine. It is a cycle of four steps: (1) heat is absorbed from a high-temperature source, (2) the heat is used to do work, (3) the heat is dissipated to a low-temperature sink, and (4) the cycle is repeated.
22.What is a heat engine?
A heat engine is a device that converts heat energy into mechanical work.
23.What is a refrigerator?
A refrigerator is a household appliance that is used to store food and drinks at a low temperature.
24.What is an AC motor?
An AC motor is a type of electric motor that uses alternating current to create rotational motion.
25.What is an electric generator?
An electric generator is a device that converts mechanical energy into electrical energy.
26.What is a turbine?
A turbine is a device used to convert the energy of a moving fluid (liquid or gas) into mechanical energy.
27.How does a steam turbine work?
A steam turbine works by using the thermal energy of steam to rotate a series of blades. The blades are attached to a shaft, which rotates the turbine.
28.How does a gas turbine work?
A gas turbine works by burning fuel in a confined space to create a high-pressure gas. That gas is then used to turn a turbine, which powers an electric generator.
29.What is the efficiency of a heat engine?
The efficiency of a heat engine is the ratio of the work done by the engine to the energy put into the engine.
30.What are some applications of heat engines?
A heat engine is a device that converts heat energy into mechanical energy. Some applications of heat engines include power generation, automobile engines, and jet engines.
