C: 1 and 3 only
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The diagram shows the energy transfer through a machine. The machine is 50% efficient. Which equation is correct?
A crane lifts a load of 6000N through a vertical distance of 15m in 30 s. What is the average useful power during thi…
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?
A cell is connected in series with an ammeter and a lamp. The reading on the ammeter is 1 A. In which circuit, using …
The diagram represents part of a household circuit containing an electric kettle. Which row correctly identifies the …
A wire hangs between the poles of a magnet. When there is a current in the wire, in which direction does the wire move?