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# AS101ps3 - J.I AS101 Problem Set#3 25 Venus has no oceans...

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J.I. AS101 Problem Set #3 6/12/07 25. Venus has no oceans, so it could not have tides even if it had a moon (which it doesn’t). This statement does not make sense even through all its confusing phrasing. If Venus did have a moon, even it didn’t have any oceans, it would still have a tidal effect. Tidal forces doesn’t just affect the oceans on Earth, it also compresses the entire rock slightly pulling out the sides. This effect would still happen on Venus regardless of having oceans or not, if it had a moon. Without a moon Venus does not have strong tidal forces just the forces from its orbit around the Sun. 35. As an interstellar gas cloud shrinks in size, its gravitational potential energy: (a) stays the same at all times. (b) gradually is transformed into other forms of energy. (c) gradually grows larger. (b) The gas cloud’s gravitational potential energy will be gradually transformed into other forms of energy. As the cloud shrinks in size it is the gas particles attracting each other by their particular gravitational potential energy, so as their distances decrease the energy is released in other forms. Commonly this potential energy is released in thermal energy as a gas cloud could be forming into a star. 37. According to the law of universal gravitation, what would happen to Earth if the Sun were somehow replaced by a black hole of the same mass? (a) Earth would be quickly sucked into the black hole. (b) Earth would slowly spiral in to the black hole. (c) Earth’s orbit would not change. According to the law of universal gravitation all systems of gravitation are based off of their masses and their distances. So if the Sun was replaced by anything of the same mass and nothing else changed in the system then the Earth’s orbit would not change. So based off of the law of universal gravitation you must answer this question as (c) Earth’s orbit would not change.

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43. The Gravitational Law.
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AS101ps3 - J.I AS101 Problem Set#3 25 Venus has no oceans...

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