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
Answer: A
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A typical "shooting star" during a meteor shower is caused by a ________ entering Earth's atmosphere.
A) boulder-size particle from an asteroid B) boulder-size particle from a comet C) pebble-size particle from an asteroid D) pebble-size particle from a comet E) microscopic particle of interstellar dust
If we double the frequency of a system undergoing simple harmonic motion, which of the following statements about that system are true? (There could be more than one correct choice.)
A) The amplitude is doubled. B) The angular frequency is reduced to one-half of what it was. C) The period is doubled. D) The period is reduced to one-half of what it was. E) The angular frequency is doubled.
A trapeze artist, with swing, weighs 800 N; he is momentarily held to one side by his partner so that the swing ropes make an angle of 25.0° with the vertical. In such a condition of static equilibrium, what is the horizontal force being applied by the partner?
a. 338 N b. 693 N c. 400 N d. 373 N e. 572 N
What is the shortest wavelength of the Lyman series?
A) 91.16 nm B) 45.60 nm C) 121.5 nm D) 204.1 nm E) 365 nm