A main-sequence star's luminosity can directly inform us of
A) the star's radius.
B) the rate at which it converts hydrogen to helium.
C) the star's mass.
D) the star's distance from us.
B
You might also like to view...
Power: A 200-W light bulb is connected across a 110-V dc power supply. What current will flow through this bulb?
A. 0.90 A B. 0.36 A C. 0 A D. 0.60 A E. 1.8 A
The heating of a planet or satellite because of friction caused by stretching due to the gravitational influence of a nearby body is referred to as _____
A) friction factorization B) tidal heating C) gravitational heating D) atomic friction
The radial velocity of an Earth satellite is its velocity
A) parallel to the surface of Earth. B) perpendicular to the surface of Earth. C) attributed to satellites moving in any direction. D) none of the above
A simple magnifying glass has a focal length of 6.0 cm. An object is placed 4.0 cm from it. Sketch a ray diagram and give the characteristics of the image