B: 14/60
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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?
Which source releases carbon dioxide, a greenhouse gas, when generating electricity?
Light is incident on a mirror and is reflected as shown. What is the angle of incidence and the angle of reflection?
Light is incident on one face of a glass block at an angle of incidence of 40°. The glass block is in air. The refrac…
In a short-sighted eye, light from distant objects is not focused on the retina. Where is this light focused and what…