Energy

Question 1

What is gravitational potential energy

Answer 1

Gravitational Potential Energy is the energy that an object gains when it is pulled away from a gravitational force.

If you lifted a chair off of the floor, it gains the “potential” to accelerate towards the Earth.

The gravitational potential of an object is dependent on mass, gravitational field strength and height

Question 2

Definition of kinetic energy

Answer 2

Kinetic energy is the energy of movement

Question 3

0 degrees Celsius

Answer 3

273 Kelvins

Question 4

Definition of specific heat capacity

Answer 4

The value of heat energy required to raise the temperature of 1kg of
a substance by 1oC

Question 5

Specific latent heat of fusion

Answer 5

The energy required to change the state of substance from a solid to
a liquid

Question 6

Specific latent heat of vaporisation

Answer 6

The energy required to change the state of substance from a liquid to
a gas

Question 7

Specific latent heat (in general)

Answer 7

Different substances require different amounts of heat energy to change the state of the substance, be that from solid to liquid, liquid to gas and vice versa.

Question 8

Temperature

Answer 8

Temperature is defined as the average kinetic energy of molecules and atoms in a system, and thus it determines how hot or cold a substance is.

Question 9

pressure

Answer 9

Pressure is force per unit area

so if you push on your desk with your hand, the pressure on the desk is the force in Newtons divided by the surface area of your hand.