From the givens, we know the following:ΔE = 150 MJΔt = 1 hour = 3600 sec.

You are watching: At midday, solar energy strikes the earth with an intensity of about 1 kw/m2.

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Replacing (3) in (1), and solving for A, we get:A = 41.67 m² , which is the area of a solar collector that could collect 150MJ of energy in 1 hour, as needed.Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack"s tangential speed. (b) what is the tacks radial acceleration?

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd a) 30 joules b) 3000 joules c) 320 joules d) 3200 joules

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