Which of the following statements is true of stars?
A) Stars should have very low densities to support their own weight.
B) Stars should have very low temperatures to support their own weight.
C) The pressure of a gas near the surface of a star does not need to be high for stability.
D) The temperature of a gas near the center of a star does not need to be high for stability.
C
You might also like to view...
If a gas cloud shrinks, its gravitational potential energy is converted into
A) chemical energy. B) thermal energy and radiative energy. C) kinetic energy and sound waves. D) only radiative energy.
An astronaut floating alone in outer space throws a baseball. If the ball moves away at 20 m/s, the astronaut will move in the opposite direction at
A) 20 m/s. B) a lower speed. C) a higher speed. D) more information needed E) none of the above
A 1500-W heater is connected to a 120-V line for 2.0 hours. How much thermal energy is produced?
A) 1.5 kJ B) 3.0 kJ C) 0.18 MJ D) 11 MJ
The work done by a variable force in moving an object between two points is equal to the area under the force versus displacement curve between those two points
Indicate whether the statement is true or false