energy

Question 1

state the law of conservation of energy ?

Answer 1

the total energy is the same at all time.

Question 2

state the 8 energy stores?

Answer 2

kinetic energy, internal energy, elastic potential energy, gravitational potential energy, electrical energy, magnetic energy, Chemical Energy ,Nuclear Energy

Question 3

state 5 energy transfers?

Answer 3

sound, heat, light, electric current, force

Question 4

state the equation for gravitational potential energy and say what each of the parts mean?

Answer 4

Eg =m x g x h
m= mass[kg]
g=acceleration due to gravity[m/s2]
h=height[m]

Question 5

state the equation for kinetic energy and say what each of the parts mean?

Answer 5

Ek =1/2 x m x v2
m=mass[kg]
v= speed [m/s]

Question 6

what does each part of the elastic energy and equations?

Answer 6

Ee =1/2 x k x e2
k= spring constant [N/m]
e= extension [m]

Question 7

what is specific heat capacity?

Answer 7

the heat required to raise the temperature of the unit mass of a given substance by a given amount (usually one degree).

Question 8

describe what each part of this equation mean ,[SHC equation ] ?

Answer 8

delta E = m x c x delta Celsius
m is the mass of the substance
c is its specific heat capacity
Δθ is the change in temperature

Question 9

state the equation for power?

Answer 9

P = W/t

Question 10

state the equation for power?

Answer 10

P = W x t