Energy Transfers In A System (GCSE Physics)

Which equation links energy transferred by heating (?E), mass (m), specific heat capacity (c) and temperature change (?T)?

An LED has total power input 4.0 W and efficiency 0.85. What is the useful power output (W)?

A spark transfers 0.60 J and 2.0 µC of charge. What potential difference (V) produced this spark?

Which of the following correctly gives the work done W when a constant force F moves an object a distance s in the direction of the force?

Two identical bungee cords, each with spring constant 735 N/m and each extended by 8.0 m, store energy which lifts a 240 kg pod. What maximum height (m) will the pod reach? (g = 9.8 N/kg)

What energy (in kJ) is stored when 100 kg of water is heated by 80 °C? (Use specific heat capacity of water = 4.2 kJ/kg °C.)

Calculate the gravitational potential energy gained (in kJ) by 100 kg of water pumped to 500 m (use g = 9.8 N/kg).

Which energy store increases when water is heated?

Which equation links energy (E), power (P) and time (t)?

The energy required to melt 0.015 kg of ice was 5010 J. What is the specific latent heat of fusion of water (J/kg)?

A nuclear power station has a power output of 500 MW. Calculate the energy output in 3600 s. Give your answer in J.