Topic 1.1-1.7 - Energy stores and systems Flashcards

1
Q

Name the 8 different energy stores

A

Thermal
Gravitational Potential
Elastic Potential
Magnetic
Chemical
Electrostatic
Nucleur
Kinetic

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2
Q

What is the law of conservation of energy

A

Energy cannot be destroyed or created only transferred usefully, stored or dissapated

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3
Q

How can energy be transferred

A

Mechanically
Electrically
Through heating
Via infared radiation
Via light or sound waves

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4
Q

Define an open and closed system

A

Open system- Can gain or lose energy to ‘outside world’
Closed System- Cannot gain or lose energy to ‘outisde world’

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5
Q

What is the equation for Kinetic Energy

A

Kinetic Energy= 1/2mv^2
Kinetic Energy (Joules, J) = 1/2 Mass (grams, g) x Velocity (m/s) ^2

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6
Q

Define Kinetic Energy

A

The energy it possess due to its motion

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7
Q

What is the equation for Weight

A

Weight (N)= Mass x Gravitational field strenght
W=mg

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8
Q

What is the equation for Gravitational Potential energy

A

Gravitational Potential Energy= mgh
Gravitational Potential Energy= mass (grams, g) x Gravitational field strength (N/Kg) x height (metres, m)

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9
Q

Define internal energy

A

The total energy stored by particles making up a substance or system

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10
Q

Define Specific heat capacity

A

The amount of energy (J) needed to raise temperature of 1kg of an object by 1 degrees C

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11
Q

What is the equation for specific heat capacity

A

change in Energy (J) = mass (g) x specific heat capacity (J/KgC) x change in temp (C)

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