B: kW
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Which quantity is measured in kilowatt-hours?
The diagram represents parts of a power station. What is the order of the energy changes taking place?
A crane lifts a weight of 1000 N through a vertical height of 30 m. It uses 60 000 J of energy. What is the efficienc…
A gas is enclosed in a container of fixed volume. It gains heat energy from an external source. What happens to the m…
Four containers are filled with equal volumes of water at the same temperature. Containers A and B are shaded by a tr…
A rod of metal is heated at one end. Which statement best describes the conduction of heat through the metal?