Your weight on a given planet could be calculated from:
a. how far that planet is from the Sun.
b. how fast that planet revolves around the Sun.
c. how fast that planet rotates.
d. the mass of the planet and how far you are above its surface.
e. the mass of that planet and its diameter.
e
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According to our theory of solar system formation, which law best explains why the central regions of the solar nebula got hotter as the nebula shrank in size?
A) Newton's third law B) the law of conservation of angular momentum C) the law of conservation of energy D) the two laws of thermal radiation
A small, hot object makes thermal contact with a more massive, equally hot object. Consequently,
1.there will be a net flow of energy from the smaller object to the larger object. 2.there will be a net flow of energy from the larger object to the smaller object. 3.there will be zero net flow of energy. 4.more information is required to determine the direction of the net flow of energy.
A block is projected with speed v across a horizontal surface and slides to a stop due to friction. The same block is then projected with the same speed v up an incline where it slides to a stop due to friction. In which case did the total mechanical energy of the block decrease the least?
a. This problem cannot be solved since it was not indicated whether the horizontal surface and the incline both had the same coefficient of kinetic friction. b. The case on the horizontal surface had the least decrease in total mechanical energy. c. The case on the inclined surface had the least decrease in total mechanical energy. d. In both cases the decrease in mechanical energy was the same.
A myopic (nearsighted) dancer wears eyeglasses that allow him to have clear distant vision. The power of the lenses of his eyeglasses is -3.00 diopters. Without eyeglasses, what is the far point of the dancer?
A) 0.50 m B) 0.17 m C) 0.42 m D) 0.33 m E) 0.25 m