A 60-kg woman runs up a staircase 15 m high (vertically) in 20 s. Required:
a. How much power does she expend?
b. What is her horsepowerrating.

Aspectroscope breaks light up into its colors, allowing scientists to analyze light from the solar system and universe. by studying the spectral line patterns, widths, strengths and positions, scientists can determine the speed, position, and of celestial bodies. a) age b) origin c) rotation d) temperature