The center of mass (or center of gravity) of a two-particle system is at the origin. One particle is located at (3.0 m, 0.0 m) and has a mass of 2.0 kg. The other particle has a mass of 3.0 kg. What is the location of the 3.0-kg particle?
A) (-3.0 m, 0.0 m)
B) (-2.0 m, 0.0 m)
C) (2.0 m, 0.0 m)
D) (3.0 m, 0.0 m)
B
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The amount of current in a CFL rated 23W-120V is about
A) 0.2A. B) 5.2A. C) more than 5.2A.
Two children seat themselves on a seesaw. The one on the left has a weight of 400 N while the one on the right weighs 300 N. The fulcrum is at the midpoint of the seesaw. If the child on the right is not at the end but is 1.50 m from the fulcrum and the seesaw is balanced, what is the torque provided by the weight of the child on the left? (Take ccw as positive.)
a. 600 N•m c. –600 N•m b. 450 N•m d. –450 N•m
Most of the visible light we see coming from the sun originates from the
a. chromosphere. b. photosphere. c. corona. d. sunspots. e. magnetic field.