The net force acting on an object is equal to the rate of change of its momentum
Indicate whether the statement is true or false
TRUE
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What has to change in the expression F = p / t (which for p = mv is equivalent to Newton's second law) to fit the theory of special relativity?
a. The momentum p has to equal mv, instead of just mv, where is the relativistic adjustment factor. b. The force F has to equal t/p, instead of p/t. c. We have to measure t instead of t. d. The speed v is replaced by c, the speed of light. e. There is no way to reconcile Newton's second law with the theory of special relativity.
If light has a wavelength of 600 nm in a vacuum, what is its wavelength in a material with an index of refraction of 1.50?
A. 600 nm
B. 900 nm
C. 400 nm
D. 
E. 267 nm
A 100-kg student eats a 200-Calorie doughnut. To "burn it off", he decides to climb the steps of a tall building. How high (in m) would he have to climb to expend an equivalent amount of work? (1 food Calorie = 103 calories.)
a. 273 b. 623 c. 418 d. 854 e. 8 400
Which of the following statements about parallax is not true?
A) The existence of stellar parallax is direct proof that Earth orbits the Sun. B) You can demonstrate parallax simply by holding up a finger and looking at it alternately from your left and right eyes. C) Ancient astronomers were unable to measure parallax and used the absence of observed parallax as an argument in favor of an Earth-centered universe. D) Measurement of stellar parallax allows us to determine distances to nearby stars. E) The technique of stellar parallax was used by Hubble to determine that the Andromeda Galaxy (M 31 ) is about 2 million light-years away.