Meters: A galvanometer can be converted to an ammeter by the addition of a
A. small resistance in parallel.
B. large resistance in parallel.
C. small resistance in series.
D. large resistance in series.
Answer: A
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What is the common trait of all main-sequence stars?
A) They are all spectral type G. B) They generate energy through hydrogen fusion in their core. C) They all have approximately the same mass. D) They are in the final stage of their lives.
At what speed will a car round a 125 m radius curve, banked at a 45° angle, if no friction is required between the road and tires to prevent the car from slipping? (g = 9.8 m/s2)
a. 27 m/s c. 23 m/s b. 17 m/s d. 35 m/s
A boxer punches a sheet of paper in midair from rest to a speed of 40 m/s in 0.05 s. If the mass of the paper is 0.01 kg, the force of the punch on the paper is
A) 0.08 N. B) 0.8 N. C) 8.0 N. D) 80 N.
Any change of the energy of a system occurs because of
a. energy transfer across the boundaries of the system. b. combustion of fuels within the system. c. radioactive decay of elements within the system. d. all of the above. e. only (b) and (c) above.