For how many minutes would you need to cycle to use up the energy in 100 g of chocolate? With energy (KJ) of 25 for each minute

An object of dimensions 50 cm x 40 cm x 0.20 cm has a mass 60g. find its density in g/cm3 and kg/ m3

What are the factors that affect the resistance of a wire?

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.