Changes in energy

Question 1

What is the equation for thermal energy?

Answer 1

Mass x Specific Heat Capacity x Change in temperature

Question 2

What are the units for mass?

Answer 2

Kilograms

Question 3

What are the units for Specific Heat Capacity?

Answer 3

Joules per Kilogram degrees Celcius

J/Kg degrees Celcius

Question 4

What are the units for temperature

Answer 4

Degrees Celcius

Question 5

What are the units for energy

Answer 5

Joules

Question 6

What is the equation for Gravitationla Potential Energy?

Answer 6

Mass x Height x Gravity

Question 7

What are the units for height?

Answer 7

Metres (m)

Question 8

What are the units for gravity?

Answer 8

N/kg

Newton per Kilogram

Question 9

What is the gravitational field strength on earth

Answer 9

9.8 N/Kg

Question 10

What is the equation for Elastic Potential Energy?

Answer 10

1/2 x K x e squared

K= spring constant
e = extension

Question 11

What are the units for Spring Constant?

Answer 11

N/m

Question 12

What are the units for extension

Answer 12

Metres (m)

Question 13

What is extension the same as in the elastic potential equation

Answer 13

Compression

Question 14

What is the equation for kinetic energy?

Answer 14

1/2 x mass x velocity squared

Question 15

What are the units for velocity?

Answer 15

Metres/second (m/s)

Question 16

What is the definition of Specific Heat Capacity?

Answer 16

The amount of energy required to heat 1kg of a substance by 1 degrees Celcius

Question 17

What is the equation for Power?

in terms of energy transferred

Answer 17

Power = Energy / Time

Question 18

What is the unit for time

Answer 18

Seconds (s)

Question 19

What is the
unit for Power?

Answer 19

Watts (W)