Velocity Addition: A spaceship is moving in a straight line away from Earth at 0.80c, measured relative to Earth. It launches a missile that moves away from the spaceship in the forward direction at 0.60c, relative to the ship. Relative to Earth, what is the speed of this missile?
A. greater than 0.80c but less than c
B. 1.4 c
C. c
D. greater than c but less than 1.4c
Answer: A
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Thin Films: A soap bubble film that is 106 nm thick and has an index of refraction of 1.42 results in constructive interference in the reflected light if this film is illuminated by a beam of light with a wavelength of 601 nm. What are the next three thicknesses of this film that will also result in constructive interference?
A. 212 nm, 318 nm, 424 nm B. 53.0 nm, 35.3 nm, 26.5 nm C. 212 nm, 424 nm, 636 nm D. 67.0 nm, 42.4 nm, 22.3 nm E. 318 nm, 530 nm, 742 nm
When we enlarge a photograph of an iron ring, the image of the hole becomes
A) smaller. B) larger. C) neither smaller nor larger.
The two nuclei used for the fuel in fission bombs are
A) 235Th and 235U. B) 234Th and 238U. C) 235U and 239Pu. D) 238U and 239Pu. E) 234Th and 239Pu.
Is it possible for a moving object to be in equilibrium?