Why is Venus' rotation unusual?
What will be an ideal response?
Venus is the only terrestrial planet to rotate retrograde (or backwards or clockwise) on its axis.
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High-energy photons are used to bombard an unknown metal. The strongest peak is found for X-rays with an energy of 66 keV. What is the atomic number of the metal?
A) 80 B) 81 C) 82 D) 83 E) 84
Add the following lengths, each obtained from a different measuring instrument, and round the answer to the proper number of significant figures: 20.02 m, 5.91 m, 0.0097 m, and 2.467 m
What will be an ideal response?
A camera gives a correct exposure at f/4 with a shutter speed of 1/128 s. In order to increase the depth of field, the f-stop is changed to f/8. What shutter speed will now give a correct exposure if lighting conditions do not change?
1.1/512 s 2.1/256 s 3.1/32 s 4.1/16 s
The orbital motion of a wave is greatest (has the largest "diameter") at
A) the wave base. B) about one-half the depth of the wave base. C) a depth of one-half the wavelength. D) the surface.