If a pendulum makes 12 complete swings in 8.0 s, what are its (a) frequency and (b) period?
What will be an ideal response?
(a) 1.5 Hz (b) 0.67 s
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Planet Z-34 has a mass equal to 1/3 that of Earth, a radius equal to 1/3 that of Earth, and an axial spin rate 1/2 that of Earth
With g representing, as usual, the acceleration due to gravity on the surface of Earth, the acceleration due to gravity on the surface of Z-34 is A) g/3. B) 3g. C) 9g. D) g/9. E) 6g.
The spacing between reflecting planes in a crystal is 2.82 × 10^-10 m. A beam of X-rays is strongly reflected at an angle of 160° with the crystal face. What is the wavelength of the X-rays?
If the Earth rotated more slowly so that the length of a day was longer, the radius of a communications satellite in synchronous orbit would be ________.
Fill in the blank(s) with the appropriate word(s).
As we grow older, the greatest hearing difficulty is with frequencies that are
A) low. B) mid-range. C) high.