A pulsar requires that a neutron star I. rotate rapidly. II. have a radius of at least 10 km. III. have a strong magnetic field. IV. rotate on an axis that is different from the axis of the magnetic field
a. I & III
b. I & IV
c. II, III, & IV
d. I, III, & IV
e. I, II, III, & IV
d
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a. True b. False Indicate whether the statement is true or false
Fluid Flow: Water flows out of a large reservoir through an open pipe, as shown in the figure. What is the speed of the water as it comes out of the pipe?
A. 8.9 m/s B. 9.9 m/s C. 13 m/s D. 14 m/s E. 16 m/s
What is a heat engine?
a. A machine that heats up as it does work. b. A machine that produces heat. c. A machine that destroys heat, cooling its surroundings. d. A machine that converts heat to work. e. A machine that transfers heat to surrounding cooler objects.
If the temperature of a gas is increased from 20°C to 100°C, by what factor does the rms speed of an ideal molecule change?
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