A car accelerates uniformly. It starts from rest and reaches 36 m/s after 6.0 seconds. During the 6.0 seconds it has traveled ________ m.
Fill in the blank(s) with the appropriate word(s).
108
108.0
110
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Two balls, one of radius R and mass M, the other of radius 2R and mass 8M, roll down an incline. They start together from rest at the top of the incline. Which one will reach the bottom of the incline first?
A) The small sphere B) Both reach the bottom together. C) The large sphere D) It depends on the height of the incline. E) It depends on the length of the inclined surface.
In the double-exhaust model, the radio lobes of a radio galaxy are inflated by
a. jets of excited gas flowing from the central galaxy. b. jets of high-energy sound waves flowing from the central galaxy. c. a disk of ionized material that orbits very near a supermassive black hole. d. dark clouds of very cold gas and dust. e. None of the other choices are correct.
Which of the following not generally thought of as matter?
A) light B) trees C) air D) clouds E) rain
A food calorie is a kilocalorie in SI units. What would be the speed of a 1000 kg car traveling such that its kinetic energy is equal to the energy contained in one 250-calorie jelly doughnut?
A. 46 m/s B. 65 m/s C. 32 m/s D. 22 m/s