A: fossil fuels
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A builder lifts eight slabs from the ground on to the back of a lorry 1.5 m high. The total time taken is 48 s and ea…
A child slides down a slide. The weight of the child is 250 N. The height of the slide is 7.0 m. The work done agains…
What uses non-renewable energy?
Three identical cells are connected in parallel to a resistor. What is the advantage of using three cells in parallel…
When the flash on a camera is used, a charge of 1.5 C flows through the flash-tube in 0.0030 s. The average voltage a…
A 1.0 m length of wire of cross-sectional area 0.40 mm² has a resistance of 2.0 Ω. What is the resistance of a 0.50 m…