A rectangle has a length of 1.323 m and a width of 4.16 m. Using significant figure rules, what is the area of this rectangle?
A. 5.50368 m2
B. 5.5037 m2
C. 5.504 m2
D. 5.50 m2
E. 5.5 m2
Answer: D
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By locating the north celestial pole (NCP) in the sky, how can you determine your latitude?
A) The altitude of the NCP is your angular distance from the North Pole. B) The direction of the NCP is the angular distance from the North Pole. C) The direction of the NCP is the same as your latitude. D) The altitude of the NCP is the same as your distance from the North Pole. E) The altitude of the NCP is the same as your latitude.
Two identical balls are thrown directly upward, ball A at speed v and ball B at speed 2v, and they feel no air resistance. Which statement about these balls is correct?
A) Ball B will go four times as high as ball A because it had four times the initial kinetic energy. B) Ball B will go twice as high as ball A because it had twice the initial speed. C) The balls will reach the same height because they have the same mass and the same acceleration. D) At their highest point, the acceleration of each ball is instantaneously equal to zero because they stop for an instant. E) At its highest point, ball B will have twice as much gravitational potential energy as ball A because it started out moving twice as fast.
The exhaust product from a hydrogen fuel cell is
A) carbon dioxide. B) methane. C) pure water. D) nitric acid.
Two pairs of sunspots appear similar, but if one was observed in 1990, and the next in 2002, we would note what difference?
What will be an ideal response?