As a body cools, its ________ decreases.
A. brightness
B. total emitted energy
C. internal energy
D. All of these choices are correct.
Answer: D
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What is a meteoroid?
A. a space rock that survives its fall through Earth's atmosphere and reaches the ground B. any one of the large rocky bodies that orbit the Sun, primarily between Jupiter and Saturn C. a glowing trail of hot gas and debris heated by friction as an object moves through the atmosphere D. the object that causes a "shooting star," but before it passes through the atmosphere
About what fraction of the initial activity of a radioactive source remains after 10 half-lives?
a. 1.0 × 10^–10 b. 9.8 × 10^–4 c. 5.0 × 10^–2 d. 3.9 × 10^–3
The electrons are bound to an atom by the attraction between their negative charge and the positive charge on the nucleus. This attraction is known as the _____
A) Coulomb force B) Doppler effect C) Lorentz force D) Casimir effect
The early Solvay Conferences had a great effect upon the development of quantum mechanics
Indicate whether the statement is true or false