What do astronomers mean when they say that we are all "star stuff"?
A) Life would be impossible without energy from the Sun.
B) Earth formed at the same time as the Sun.
C) Many of the elements from which we and Earth were made were created by stars.
D) The Sun formed from the interstellar medium: the "stuff" between the stars.
E) The universe contains billions of stars.
C) Many of the elements from which we and Earth were made were created by stars.
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A ______________ is always shorter than a ______________
a. solar day; sidereal day b. solar day; mean solar day c. sidereal day; solar day d. mean solar day; solar day
Simple Harmonic Motion: If the frequency of the motion of a simple harmonic oscillator is doubled, by what factor does the maximum speed of the oscillator change?
A. 2 B. 4 C. It does not change. D. 1/2 E. 1/4
Mouthwash is a good example of
a. a compound. b. a heterogeneous mixture. c. a homogeneous mixture. d. an element.
SAE 50 oil at 70ºF flows through a 2 ft long copper tube of ¼ inch inside diameter. What must the pressure drop be through the tube if 10 lbm/min of oil is flowing through the tube?
What will be an ideal response?