The size of a dollar bill is 6.6 cm wide, 15.6 cm long and 0.109 mm in thickness. Approximately how many dollar bills are in a 0.49‑inch stack?

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

Which describes increasing the efficiency of energy resource

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