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Science - Physics > Formulas > Flashcards

Formulas Flashcards

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1
Q

How to calculate change in GPE(joules)?

A

mass(kg) x gravitational field strength(n/kg)

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2
Q

How to calculate mass(kg) using gravitational field strength and weight?

A

weight(N) / gravitational field strength(N/kg)

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3
Q

How to calculate work done(joules)?

A

force(N) x distance(metres)

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4
Q

How to calculate kinetic energy(joules)?

A

1/2 x mass(kg) x speed^2(metres/second)

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5
Q

How to calculate efficiency(%)?

A

(useful energy output(joules) x 100) / total energy output(joules)

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6
Q

How to calculate power(w)?

A

energy transferred to appliance(joules)

/ time taken for energy to be transferred(joules)

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7
Q

How to calculate Specific Heat Capacity?

A

energy = mass x SPC x change in temp
or
SPC = energy / (mass x change in temp)

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Science - Physics (5 decks)

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