A proposed explanation for gamma-ray bursters is:
A) hypernova-making black holes and bi-polar jets.
B) coalescence of a neutron star binary.
C) collisions between two white dwarfs.
D) Both A and B are possible.
E) All three are possible.
D
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A vertical cylinder, closed at the bottom end, contains 0.0100 mol of ideal gas. It is fitted at the top with a piston that can move freely
The mass of the piston is 14.0 kg and the initial height of the piston above the bottom of the cylinder is 25 cm. What is the temperature of the gas? (R = 8.31 J/mol ? K) A) 290 K B) 413 K C) 3620 K D) 405 K E) 500 K
The actual amount of time it takes for Earth to rotate 360° on its axis is called a
a. meridian day. b. 24-hour day. c. sidereal day. d. mean solar day. e. solar day.
Two taut strings of identical mass per unit length are stretched with the same tension with their ends fixed, but one string is 0.330 cm longer than the other
Waves on these strings propagate at 34.0 m/s.The fundamental frequency of the shorter string is 258 Hz. What is the beat frequency when each string is vibrating at its fundamental frequency? A) 12.3 Hz B) 9.00 Hz C) 12.0 Hz D) 12.7 Hz E) 11.3 Hz
An exoergic reaction
a. absorbs energy. b. requires a high temperature. c. releases energy. d. occurs only in stars.