Suppose that Earth rotated once every 48 hours (instead of 24 hours), but Earth's orbit and the Moon's distance were still the same (and their masses were still the same). Which of the following statements would be true?
A) Along coastlines, the time between one high tide and the next would be longer.
B) The length of the year would be longer.
C) Along coastlines, the time between one high tide and the next would be shorter.
D) The Moon's orbital period would be longer.
E) There would be more days in each year.
A) Along coastlines, the time between one high tide and the next would be longer.
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For a plane to be able to fly clockwise in a horizontal circle as seen from above, in addition to exerting a force downwards on the air
A. it must be increasing its speed. B. it must exert a force on the air that is directed to the plane's left side. C. it must exert a force on the air that is directed to the plane's right side. D. it does not need to exert a force: it must only move the wing flaps out. E. it only needs to deflect the air without exerting any additional force on the air.
A light bulb operating at 110 V draws 1.40 A of current. What is its resistance?
A) 12.7 ? B) 78.6 ? C) 109 ? D) 154 ? E) 178 ?
Comet orbits all have ________ eccentricity compared to the asteroids
Fill in the blank(s) with correct word
An object is placed a distance d from a converging lens. The object is then moved to a distance 2d from the converging lens. Which of the following statements is false?
a. The image in the second case with the object at distance 2d can be the larger one. b. If both images are real, the image in the second case is smaller. c. If the image in the first case is real, the image in the second case is upright. d. The image in the first case with the object at distance d can be the larger one.