Energy Changes In Systems (GCSE Physics)

What is the primary energy store that increases when a spring is stretched?

Which statement best describes conservation of energy in a closed system (neglecting losses)?

A resistor dissipates power P = I^2 R. If P = 340 mW and I = 0.75 A, what is R?

Which equation links work done (W), force (F) and distance (s)?

Which energy equation gives gravitational potential energy change ?E = m g h?

Which energy store increases when water is heated?

Which process transfers energy by electromagnetic waves and does not require particles or a medium?

Two identical bungee cords each have k = 735 N/m and are stretched 8.0 m before release. A 240 kg pod is launched upward when cords return their elastic energy (g = 9.8 N/kg). Ignoring losses, calculate the maximum height reached.

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

Which storage method stores more useful energy per 100 kg of water if Method A stores 33,600 kJ but 40% is wasted and Method B stores 490 kJ but 25% is wasted?

Which energy store increases when water is pumped uphill into a reservoir?