The ____________________ is a measure of how many times larger the angular size of an object appears through a telescope
Fill in the blank(s) with correct word
magnification
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The potential energy of a spring is 0.3 J when it is compressed 0.04 m to the left of its equilibrium position. This is its leftmost position. What is its kinetic energy at this point?
A. 375 N/m B. -0.3 J C. zero D. 0.3 J
Algebraic symbols in physics equations represent physical quantities, therefore
A. the symbols represent numbers only. B. the symbols represent numbers and units. C. the symbols consist of units only. D. the symbols are only abstract. E. the symbols are only imaginary.
A very long string is tied to a rigid wall at one end while the other end is attached to a simple harmonic oscillator. Which of the following can be changed by changing the frequency of the oscillator?
a. The speed of the waves traveling along the string. b. The tension in the string. c. The wavelength of the waves on the string. d. All of the above. e. None of the above.
Before about 50,000 years after the Big Bang, the universe was:
A) radiation dominated. B) quark dominated. C) lepton dominated. D) matter dominated. E) dark energy dominated.