If the voltage across the ends of a wire increases, the current in the wire __________
Fill in the blank(s) with correct word
increases
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On a Hertzsprung-Russell diagram, where would you find stars that have the largest radii?
A) upper right B) lower right C) upper left D) lower left
A race track is constructed such that two arcs of radius 80 m at A and 40 m at B are joined by two stretches of straight tracks as in the figure. In a particular trial run, a driver traveled at a constant speed of 50 m/s for one complete lap. In this case, the ratio of the centripetal acceleration at A to that at B is
An observer in the Northern Hemisphere takes a time exposure photograph of the night sky. If the illustration below depicts the photograph taken by the observer, which direction was the camera pointing?
a.
straight north
b.
straight east
c.
straight south
d.
straight west
e.
straight up, directly overhead
A sculptor strikes a piece of marble with a hammer. Find the speed of sound through the marble (in km/s). (The Young's modulus is 50 × 10^9 N/m2 and its density is 2.7 × 10^3 kg/m3.)
a. 5.1 b. 4.3 c. 3.5 d. 1.3 e. 1.8