It takes 200 golf balls to equal the mass of four bowling balls, what is the relative mass of bowling balls to golf balls?
A) 1/50
B) 1/20
C) 20 times
D) 100 times
E) 6.022 × 1023
Answer: A
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A bubble having a diameter of 1.00 cm is released from the bottom of a swimming pool where the depth is 5.00 m. What will the diameter of the bubble be when it reaches the surface? The temperature of the water at the surface is 20.0°C, whereas it is 15.0°C at the bottom. (The density of water is 1.00 × 103 kg/m3.)
A. 1.05 cm B. 1.15 cm C. 1.45 cm D. 1.65 cm E. 1.35 cm
A long wire is known to have a radius greater than 4.0 mm and to carry a current uniformly distributed over its cross section. If the magnitude of the magnetic field is 0.285 mT at a point 4.0 mm from the axis of the wire and 0.200 mT at a point 10 mm from the axis, what is the radius of the wire?
a. 4.6 mm b. 7.1 mm c. 5.3 mm d. 12 mm e. 10 mm
A charged particle moving perpendicular to a magnetic field has a magnet force on it. But when an observer moves with the particle, so that the particle has a relative velocity of zero with respect to the observer, one would expect there would be no magnetic force. Yet there is still a force. If it is not a magnetic force, then what is the source of this force?
a. It is an electrical force. b. It is due to the ether. c. It is a gravitational force. d. It is something other than any of the above.
A blimp is filled with 200 m3 of helium. How much mass can the balloon lift? The density of helium is one-seventh that of air, and the density of air is 1/800 that of water. Consider the mass of the balloon to be negligible
a. 115 kg b. 214 kg c. 315 kg d. 415 kg e. 37 kg