Compared to the magnitude of the charge on a proton, the magnitude of the electrical charge carried by an electron is
A. about the same.
B. only 1/3 as large.
C. only 1/2 as large.
D. exactly the same.
Answer: D
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The amount of gravitational force that acts on a space vehicle while in Earth orbit is
A) nearly zero. B) nearly as much as the vehicle's weight on Earth's surface. C) the same as the vehicle's weight on Earth's surface.
Energy released by the Sun results from the process wherein atomic nuclei
A) break apart. B) combine. C) both of these D) neither of these
A proton is accelerated from rest through a potential difference of 150 V. It then enters a region of uniform magnetic field and moves in a circular path (radius = 12 cm). What is the magnitude of the magnetic field in this region?
a. 18 mT b. 12 mT c. 15 mT d. 22 mT e. 10 mT
Object 1 has twice the mass of Object 2 . Each of the objects has the same magnitude of momentum. Which of the following statements is true?
a. Both objects can have the same kinetic energy. b. One object has 0.707 times the kinetic energy of the other. c. One object has twice the kinetic energy of the other. d. One object has 4 times the kinetic energy of the other.