What is the radius of curvature of the path of a 3.0-keV proton in a perpendicular magnetic field of magnitude 0.80 T?
a. 9.9 mm
b. 1.1 cm
c. 1.3 cm
d. 1.4 cm
e. 7.6 mm
A
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Which terrestrial planet is about one-third the size of Earth?
A. Earth B. Venus C. Mars D. Mercury
The best evidence for quarks comes from
A. the decay of electrons into quarks and mesons. B. scattering experiments performed at very high energies. C. theories that would not make sense if quarks did not exist. D. particles seen outside the nucleus with charge 1/3 the charge of a proton.
In a hydraulic garage lift, the small piston has a radius of 5.0 cm and the large piston has a radius of 15 cm
What force must be applied on the small piston in order to lift a car weighing 20,000 N on the large piston? Assume the pistons each have negligible weight. A) 6.7 × 103 N B) 5.0 × 103 N C) 2.9 × 103 N D) 2.2 × 103 N
Consider a moon that orbits one of our most distant planets in an elliptical path. The distance that the moon covers each day is
A) greatest when closest to the planet. B) greatest when farthest from the planet. C) the same everywhere. D) need more information