1) what is SI unit of solid angle?
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Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

What is the single most important equation in all of physics?