If m = 4, how may possible values can the spin quantum number ms have?
A) 3
B) 5
C) 4
D) 2
E) 1
F) 0
D
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Given that white dwarf supernovae are such good standard candles, why don't we use them to measure the distance to all galaxies?
A) They are rare events, so we have observed them in only a tiny fraction of all galaxies. B) They can occur only in spiral galaxies, not elliptical galaxies. C) We would, but we don't have enough telescopes. D) We cannot see them beyond a distance of about 100 million light-years.
A 15-kg child is sitting on a playground teeter-totter, 1.5 m from the pivot. What is the minimum distance, on the other side of the pivot, such that a 220-N force will make the child lift off the ground?
A) 2.4 m B) 0.10 m C) 1.5 m D) 9.8 m E) 1.0 m
A 35.0-N crate is pulled up a 4.0-m inclined plane by a worker at constant velocity. If the plane is inclined at an angle of 37° to the horizontal and there exists a constant frictional force of 25.0 N between the crate and the surface, what is the force applied by the worker?
a. zero b. 3.95 N c. 21.1 N d. 46.1 N e. 84.2 N
A doubly charged ion with velocity 6.9 × 106 m/s moves in a path of radius 30 cm in a magnetic field of 0.80 T in a mass spectrometer. What is the mass of this ion?
A) 11 × 10-27 kg B) 6.7 × 10-27 kg C) 4.5 × 10-27 kg D) 3.3 × 10-27 kg E) 8.2 × 10-27 kg