A 120-kg refrigerator, 2.00 m tall and 85.0 cm wide, has its center of mass at its geometrical center. You are attempting to slide it along the floor by pushing horizontally on the side of the refrigerator
The coefficient of static friction between the floor and the refrigerator is 0.300. Depending on where you push, the refrigerator may start to tip over before it starts to slide along the floor. What is the highest distance above the floor that you can push the refrigerator so that it won't tip before it begins to slide? A) 0.710 m
B) 1.00 m
C) 1.21 m
D) 1.42 m
E) 1.63 m
D
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Another name for a pulsar is _______________
a. neutron star b. black hole c. quasar d. red giant
Four different compact fluorescent bulbs and their comparison to incandescent bulbs are advertised as follows: a 42-W cfl produces the light of a 150-W incandescent, a 9-W cfl produces the light of a 40-W incandescent, a 23-W cfl produces the light of a 100-W incandescent,and a 13-W cfl produces the light of a 60-W incandescent. Which cfl produces the most light per watt, and which one produces
the least? Assume true advertising! a. the 13 W, the 42 W c. the 23 W, the 42 W b. the 9 W, the 23 W d. the 42 W, the 13 W
What is the "center of mass"?
a. The exact middle of any object, measured from all its edges. b. The location that the object would concentrate to if we imagined it to shrink to a point. c. An arbitrarily chosen point in the object used to describe its motion. d. A point in space that the object is moving toward. e. A point in space to which an object is attracted.
Collisions in Two Dimensions: A 900-kg car traveling 30.0° south of east at 12.0 m/s suddenly collides with a 750-kg car traveling north at 17.0 m/s. The cars stick together after colliding. What is the speed of the wreckage just after the collision?
A. 7.21 m/s B. 12.2 m/s C. 20.4 m/s D. 25.0 m/s E. 17.3 m/s