Light of different colors in a glass prism travel at
A) different speeds.
B) the same speed.
C) the same speed in prisms and all materials.
Answer: A
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What would a civilization within 60 light-years away be able to detect from Earth?
a. our first TV transmissions b. our cellular phone transmissions c. our production of machines that create noise d. our excessive carbon emissions e. our wireless Internet transmissions
Three masses are located in the x-y plane as follows: a mass of 6 kg is located at (0 m, 0 m), a mass of 4 kg is located at (3 m, 0 m), and a mass of 2 kg is located at (0 m, 3 m). Where is the center of mass of the system?
A) (1 m, 2 m) B) (2 m, 1 m) C) (1 m, 1 m) D) (1 m, 0.5 m) E) (0.5 m, 1 m)
In the amended Montreal Protocol, many nations agreed to phase out, by the year 2000,
a. trash burning. b. hydrocarbons. c. gasoline automobiles. d. CFCs.
Simple Harmonic Motion: An object oscillates such that its position x as a function of time t obeys the equation x = (0.222 m) sin(314 s-1 t), where t is in seconds.(a) In one period, what total distance does the object move?(b) What is the frequency of the motion?(c) What is the position of the object when t = 1.00 s?
What will be an ideal response?