What is the change in area (in cm2) of a 60.0 cm by 150 cm automobile windshield when the temperature changes from 0° C to 36.0° C. The coefficient of linear expansion of this glass is 9.0 × 10^?6/°C
a. 1.6
b. 2.9
c. 3.2
d. 4.9
e. 5.8
e
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A student wants to establish a standing wave on a wire 1.8 m long clamped at both ends. The wave speed is 540 m/s. What is the minimum frequency she should apply to set up standing waves?
A supplier wants to make a profit by buying gold by weight at one altitude and selling it at the same price per newton at another altitude. The supplier should
A) buy at a high altitude and sell at a low altitude. B) buy at a low altitude and sell at a high altitude. C) disregard altitude because it makes no difference.
Which of the following would make the demonstration illustrated in this figure function less effectively?
a. Use a piece of cardboard with a greater mass. b. Use a piece of cardboard with a greater radius. c. Use a piece of cardboard with less mass and smaller radius. d. Use a thinner pencil. e. Use a thicker pencil.
A megaparsec is equivalent to
a. 3.26 light-years. b. 206,265 AU. c. the age of our solar system. d. a million parsecs. e. the diameter of the Milky Way galaxy.