Physics 1 formulas 0.0 / 5 ? PhysicsFormulasGCSEAQA Created by: Annie.fraoneCreated on: 18-09-16 16:34 What is the formula you use to work out 'Payback time'? Initial Cost / Annual Saving 1 of 8 What is the formula you use to work out the energy transferred (J)? Mass (kg) x Specific Heat Capacity (J/kgC) x Temperature Change (C) 2 of 8 What is the formula used to work out efficiency? Useful every out / Total energy in 3 of 8 What is another formula used to work out efficiency? Useful power out / Total power in 4 of 8 What is the formula used to work out the energy of an appliance? Power x Time 5 of 8 What is the formula used to work out the No. of UNITS (kWh) used? POWER (in kWh) x TIME (in hours) 6 of 8 What is the formula used to work out the COST of electricity? No. of UNITS x PRICE per unit 7 of 8 How do you work out the speed (m/s) of a wave? Frequency (Hz) x Wavelength (m) 8 of 8

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