If an object doubles its luminosity in 10 hours, how large can the emitting source of light be?
A) about 10 light-hours across
B) about 10 parsecs across
C) about 10 light-years across
D) varies depending on how luminous the object is
E) varies depending on how far away the object is
A
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Consider a particle of mass m and rest mass mo. Which of the following is the correct expression for the kinetic energy of such a particle?
A) mo v2/2 B) m v2/2 C) m c2 - mo c2 D) 1/2(m c2 - mo c2) E) mo c2 + mo v2/2
All asteroids are spherical solid objects, similar to the Moon and Mercury, just much smaller
Indicate whether the statement is true or false
The ________ explains why the spectral lines from a rapidly rotating star are broader than those from a slowly rotating star
Fill in the blank(s) with correct word
The P-V diagram of a cyclic process shows a curve that encloses an area. The work done by the heat engine, represented by the enclosed area, is positive when the path around the area proceeds in which of the following fashions?
a. clockwise c. It is always positive. b. counterclockwise d. It is always negative.