# Chapter 1 Flashcards

1
Q

What are the 7 stores of energy

A
```Kinetic
Thermal
Elastic potential
Gravitational potential
Chemical
Magnetic
Electrostatic```
2
Q

What are the 4 energy transfers?

A

Mechanical working
Electrical working
Heating by particles

3
Q

What is the symbol and word equation for work done?

A

Work done = force x distance
W = F x S
(J) = (N) x (S)

4
Q

What’s the symbol and word equation for elastic potential?

A
```Energy = 1/2 spring constant x extension^2
Ee = 1/2 k x e^2
(J) = (N/m) x (m)```
5
Q

What is the symbol and word equation for weight?

A
```Weight = mass x gravitational field strength
W = m x g
(N) = (kg) x (N/kg)```
6
Q

What is the symbol and word equation for kinetic energy?

A

Energy (kinetic) = 1/2 mass x velocity^2
Ek = 1/2 m x v^2
(J) = (kg) x (m/s)

7
Q

What is the symbol and word equation for gravitational potential energy?

A

Energy (gravitational) = weight x height
Eg = mg x h
(J) = (kg)(N/kg) x (m)

8
Q

What is the word and symbol equation for power?

A
```Power = energy / time
P = E / T
(W) = (J) x (S)```
9
Q

What is the word equation for efficiency?

A

Efficiency = useful output / total input

10
Q

What are the prefixes?

kJ MJ mJ

A
```kJ= 1000 J
MJ= 1000 000 J
mJ= 0.001 J```
11
Q

What is the principal of conservation of energy?

A

Energy cannot be created or destroyed

only transferred from one store to another