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You are making some modifications to your Mazda Bongo van to “improve its handling” and decide to remove the shock absorbers and lower it to “make it look mean”. Without the shock absorbers, the springs in the rear suspension cause the rear axle to freely oscillate according to the following equation: y=0.1sin(9.42t) Where y is the vertical displacement of the rear axle in metres and t is measured in seconds. A small bump in the road causes one of the rear wheels of the Bongo Van to start oscillating and one of the rear wheels loses contact with the ground. If the Bongo Van is moving with a speed of 54.0 km hr–1, what distance does the van travel before the wheel makes contact with the ground again? 27.0 m 36.0 m 10.0 m 12.0 m

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Jacob Fry

Numerade educator

A 8-kg steel ball has a volume of 1 × 10–3 m3. What is the density of the ball? Select one: 2 × 10–4 kg/m3 8000 kg/m3 8 × 10–3 kg/m3 1000 kg/m3

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Supreeta N

Numerade educator

The sun is hugely important for life on Earth. It has total power output of around 3.8 × 1026 W. The fact that the Earth's temperature is not constantly increasing (barring current global warming) means that the energy arriving from the sun is radiated back into space - it is at thermal equilibrium. It can be calculated that the total power transferred to the Earth from the sun is 1.68 x 1017 W Given the surface area of the Earth is 510.1 million km2, and its emissivity is 1, the average global temperature of the Earth, that corresponds to this amount of radiation being emitted is: T = 276 C T = 276 K T = 376 K T = 245 K

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