The slow ________ of Mercury was first determined using radar signals sent from Earth
Fill in the blank(s) with correct word
rotation
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A person standing at the edge of a cliff throws one rock straight up and another rock straight down at the same initial speed. The rock that was thrown ________ has less speed at impact.
A. downward B. upward C. Each rock has the same speed just before impact
Energy in Capacitors: When a 4-?F capacitor has a potential drop of 20 V across its plates, how much electric potential energy is stored in this capacitor?
A. 0.8 ?J B. 8 ?J C. 80 ?J D. 800 ?J E. 8000 ?J
How do astronomers create three-dimensional maps of the universe?
A) through the comparison of computer models of galaxy formation with observations B) by using a galaxy's position on the sky and its redshift to determine its distance along the line of sight C) by carefully measuring the parallax of each galaxy D) by interpreting the peculiar velocities of each galaxy E) by using a galaxy's position on the sky and its brightness as a measure of distance along the line of sight
A car with tires whose radius is 35 cm is traveling along a highway at 29.8 m/s. What is the angular speed of the tires?
A) 90 rad/s B) 85 rad/s C) 80 rad/s D) 75 rad/s E) 70 rad/s