A: gas-fired power station
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A javelin has a mass of 0.80 kg. The javelin is released with 250 J of kinetic energy. What is the speed of the javelin?
Which source releases carbon dioxide, a greenhouse gas, when generating electricity?
A crane lifts a load of 6000 N through a vertical distance of 15 m in 30 s. What is the average useful power during t…
A wire hangs between the poles of a magnet. When there is a current in the wire, in which direction does the wire move?
The diagram shows a simple d.c. motor. Which labelled part is the commutator?
Two leads emerging from a box are connected to a sensitive ammeter. When a bar magnet moves towards the open end of t…