Approximately what proportion of stars have masses lower than the Sun?
A) 90%
B) 10%
C) 50%
D) 70%
A
You might also like to view...
For which of the values below is x > x7?
a. x = –2.0 b. x = 0 c. x = 1.0 d. x = 2.0 e. x = 4.0
__________is a number between 1 and 0 that describes the shape of an ellipse
A) Acceleration B) Momentum C) Mass D) Eccentricity
How far does light travel in 100 years?
A: 100 miles. B: 100 wavelengths. C: 100 light years. D: 100 astronomical units. E: 100 parsecs.
A heat engine absorbs 2 500 J of heat from a hot reservoir and expels 1 000 J to a cold reservoir. When it is run in reverse, with the same reservoirs, the engine pumps 2 500 J of heat to the hot reservoir, requiring 1 500 J of work to do so. Find the ratio of the work done by the heat engine to the work done by the pump. Is the heat engine reversible?
a. 1.0 (no) b. 1.0 (yes) c. 1.5 (yes) d. 1.5 (no) e. 2.5 (no)