A(n) ____________________ is a circle whose center moves in a circular orbit around the Earth
Fill in the blank(s) with correct word
epicycle
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A 40.0-kg crate is being lowered by means of a rope. Its downward acceleration is 2.00 m/s2. What is the force exerted by the rope on the crate?
A) 40.0 N B) 80.0 N C) 232 N D) 312 N E) 472 N
Two thin slits are 6.00 ?m apart. Monochromatic coherent light falls on these slits, and produces a fifth-order bright interference fringe at an angle of 32.3° away from the centerline. What is the wavelength of the light?
A) 164 nm B) 416 nm C) 614 nm D) 641 nm
A photon scatters off of a stationary electron. Which of the following statements about the photon are true? (There could be more than one correct choice.)
A) Its wavelength increases due to the scattering. B) Its frequency increases due to the scattering. C) Its wavelength decreases due to the scattering. D) Its frequency decreases due to the scattering. E) Its energy does not change.
The Hubble Space Telescope
a. has a flawed primary mirror b. has been repaired c. has failed d. none of the above