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Physics GCSE > Energy > Flashcards

Energy Flashcards

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1
Q

Definition of kinetic energy

A

Anything that moves

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2
Q

Definition of thermal energy

A

Objects that are hot/have heat

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3
Q

Definition of chemical energy

A

Anything that releases energy through a chemical reaction

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4
Q

Definition of gravitational potential energy

A

Anything with mass in a gravitational field

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5
Q

Definition of elastic potential energy

A

Anything stretched or compressed

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6
Q

Definition of electrostatic energy

A

Anything with 2 electrical charges interacting

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7
Q

Definition of magnetic energy

A

Anything with 2 magnets interacting

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8
Q

Definition of nuclear energy

A

Energy released through nuclear reactions, stored in atomic nuclei

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9
Q

Law of conservation of energy

A

Energy cannot be created or destroyed

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10
Q

Definition of Conduction

A

Thermal energy transfer between solids

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11
Q

Definition of convection

A

Thermal energy transfer between fluids

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12
Q

Definition of thermal conductivity

A

How quickly energy is transferred through a material

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13
Q

Renewable energy types

A

Solar
Hydroelectric
Wind
Tidal
Biofuel

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14
Q

Non renewable energy types

A

Fossil fuel
Oil
Natural gas
Coal

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15
Q

Why are no devices 100% efficient

A

Some energy is always wasted, usually through thermal energy transfer

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16
Q

Equation for efficiency

A

Efficiency = useful energy output (divided by) total energy output
X 100
(Power can be substituted for energy)

17
Q

4 ways to insulate

A

Double-glazed windows (trapped air prevents conduction)
Cavity wall insulation
Fitting carpets, curtains, draught excluders
Stone walls

18
Q

Equation for kinetic energy

A

Ek=1/2mv(2)
Ek - kinetic energy (J)
m - mass (kg)
v - velocity/speed (m/s)

19
Q

Equation for elastic potential energy

A

Ee = 1/2 ke(2)
Ee - elastic potential energy (J)
k - spring constant (N/m)
e - extension (m)

20
Q

Equation for gravitational potential energy

A

Ep = mgh
Ep - gravitational potential energy (J)
m - mass (kg)
g - gravitational field strength ( N/kg)
h - height (m)

21
Q

Equation for specific heat capacity

A

AE = mcAO
AE - change in energy (J)
m - mass (Kg)
c - specific heat capacity (J/Kg’C)
AO - change in temperature (‘C)

Physics GCSE (7 decks)

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