During the 7-3/8 days between the new and first-quarter phases, the Moon is called a(n) ______________ moon
Fill in the blank(s) with correct word
waxing crescent
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Uranus and Neptune do not contain liquid metallic hydrogen because they
a. are not massive enough. b. do not contain enough hydrogen. c. rotate too slowly. d. are too far from the sun. e. have magnetic fields that are much too weak.
Photon Energy: Two sources emit beams of light of wavelength 550 nm. The light from source A has an intensity of 10 µW/m2, and the light from source B has an intensity of 20 µW/m2. This is all we know about the two beams. Which of the following statements about these beams are correct? (There could be more than one correct choice.)
A. Beam B carries twice as many photons per second as beam A. B. A photon in beam B has twice the energy of a photon in beam A. C. The frequency of the light in beam B is twice as great as the frequency of the light in beam A. D. A photon in beam B has the same energy as a photon in beam A. E. None of these statements are true.
Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t.The work you do on the crate is Fv
a. True b. False Indicate whether the statement is true or false
At what frequency will a 12-?F capacitor have a reactance XC = 300 ??
A. 44 Hz B. 88 Hz C. 180 Hz D. 350 Hz E. 280 Hz