If two objects each carrying a charge of 1 coulomb were placed 1 meter apart, how much force would they exert on each other?
A) 9 N B) 106 N C) 9 x 109 N D) zero E) 1 N
C
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After landing on an unexplored Klingon planet, Spock tests for the direction of the magnetic field by firing a beam of electrons in various directions and by observing the following: Electrons moving upward feel a magnetic force in the NW direction
; Electrons moving horizontally North are pushed down; Electrons moving horizontally South-East are pushed upward. He naturally concludes that the magnetic field at this landing site is in which direction? A) W B) SE C) NE D) SW E) E
A fire fighting vehicle of mass 12,000 kg is at rest but free to roll with no resistance. If you push it forward with a force of 500 N, the momentum at the end of 10 s of pushing will be
A. 5000 kg m/s. B. zero. C. 20,000 kg N/s. D. 0.416 m/s.
What is the kinetic energy of a particle of mass m that has a total energy four times its rest energy?
A. 5 mc2 B. 4 mc2 C. 3 mc2 D. 2 mc2 E. 1 mc2
Suppose you released a single proton from rest at some point X in an electric field, and that you then released a single electron from rest at the same point X
How would the motions of the proton and electron compare, just after their release from rest? A) They would move in opposite directions, and the proton would move fastest. B) They would move in the same directions, and the electron would move fastest. C) They would move in the same directions, and the proton would move fastest. D) They would move in opposite directions, and the electron would move fastest. E) They would move in opposite directions, and at the same speeds.