Physics (conservation Of Energy) Flashcards

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1
Q

Kinetic energy-

A

Anything moving has energy in its kinetic energy store.

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2
Q

Thermal energy-

A

Any object- the hotter it is, the more energy it has in this store.

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3
Q

Chemical energy-

A

Anything that can release energy by a chemical reaction, e.g. food, fuels.

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4
Q

Gravitational potential energy-

A

Anything in a gravitational field (I.e. anything that can fall)

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5
Q

Elastic potential energy-

A

Anything stretched, like springs, rubber band, etc.

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6
Q

Electrostatic-

A

E.g two charges that attract or repel each other

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7
Q

Magnetic-

A

E.g two magnets that attract or repel each other.

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8
Q

Nuclear-

A

Atomic nuclei release energy from this store in nuclear reactions.

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9
Q

Conservation of energy-

A

Energy can be stored, transferred between stores, and dissipated- but it can never be created or destroyed. The total energy of a closed system have no net change.

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10
Q

Diddipsted-

A

Spread out (energy)

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11
Q

How to calculate efficiency-

A

Efficiency = useful energy transferred by device divided by total energy supplied to device.

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12
Q

Efficiency-

A

A way of describing how good a machine is at transferring energy into useful forms.

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13
Q

Insulation-

A

Slows down the rate at which energy is transferred out of a house by heating.

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14
Q

Gravitational potential energy (GPE)-

A

Energy that is stored because of an objects position in a gravitational field.

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15
Q

Change in gravitational potential energy=

A

Mass (kg) x gravitational field strength (N/kg) x change in vertical height (m)

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16
Q

Non-renewable energy resources-

A

They will run out one day. Fossil fuels and nuclear fuels

17
Q

Renewable energy resources-

A

Like wind, solar, hydro-electricity and tides, won’t run out.