An evening or morning star is a planet
a. True
b. False
Indicate whether the statement is true or false
True
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Tycho's supernova was of Type Ia. What happened to the companion star when the white
A. It turned into a black hole. B. It went zooming away at the velocity it had from its orbit. C. It immediately exploded as well. D. It merged with the white dwarf that went supernova. E. It turned into a neutron star.
A cylindrical space colony 8.00 km in diameter and 30.0 km long has been proposed as living quarters for future space explorers. Such a habitat would have cities, land, and lakes on the inside surface and air and clouds in the center. All this would be held in place by the rotation of the cylinder about the long axis. How fast would such a cylinder have to rotate to produce a 1-g gravitational
field at the walls of the cylinder? a. 0.049 rad/s b. 0.035 rad/s c. 0.0025 rad/s d. 0.15 rad/s
A string is stretched and fixed at both ends, 200 cm apart. If the density of the string is 0.015 g/cm, and its tension is 600 N, what is the fundamental frequency?
a. 316 Hz b. 632 Hz c. 158 Hz d. 215 Hz e. 79 Hz
A boy on a bicycle rides in a circle of radius 
at speed 
If the boy rides at a radius equal to half the radius 
by what factor must he change his speed in order to have the same centripetal acceleration?
A. 0.25 B. 2 C. 0.71 D. 4 E. 1.4 F. 0.5