If the net force on an object is zero,
a. there must be no forces acting on the object.
b. the object must be at rest.
c. the object's acceleration must be zero.
d. there can be no friction acting on the object.
c
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Momentum: A satellite, initially at rest in deep space, separates into two pieces, which move away from each other. One piece has a mass of 190 kg and moves away with a speed 0.500c, and the second piece has a mass of 250 kg and moves in the opposite direction. What is the speed of the second piece?
A. 0.212c B. 0.380c C. 0.402c D. 0.473c E. 0.500c
Buoyancy: A steel ball sinks in water but floats in a pool of mercury, which is much denser than water. Where is the buoyant force on the ball greater?
A. floating on the mercury B. submerged in the water C. It is the same in both cases. D. It cannot be determined from the information given.
Which of the following species is undergoing oxidation?
2 CuBr ? 2Cu + Br2 A) Cu B) CuBr C) Cu+ D) Br- E) Br2
Internal heat forces Earth's liquid core to circulate with _______________
Fill in the blank(s) with correct word