Type Ia supernovas involve a ________.
A. black hole
B. planetary nebula
C. neutron star
D. white dwarf
Answer: D
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A large heavy truck and a small baby carriage roll down a hill. Neglecting friction, at the bottom of the hill, the baby carriage will likely have
A) less momentum. B) about the same momentum. C) more momentum.
A proton, moving west, enters a magnetic field of a certain strength. Because of this magnetic field the proton curves upward. What is the direction of this magnetic field?
A) towards the west B) towards the east C) towards the south D) towards the north E) downward
Which recording formats employ magnetism?
a. videotape b. CD c. DVD d. floppy disk
A 4.20-g bullet embeds itself in a 20.0-kg block, which is attached to a horizontal spring with a force constant of 980 N/m
The maximum compression of the spring is 2.40 cm. What is the speed of the bullet just before it hits the block? A) 800 m/s B) 700 m/s C) 672 m/s D) 900 m/s E) 952 m/s