Magnetic Dynamo Theor2 - Magnetic Dynamo Theory-Venus has...

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Magnetic Dynamo Theory -Venus has no magnetic field (or one so weak, it hasn't been detected yet). It probably has a liquid conducting interior for a couple of reasons: (a) Since it is almost the size of the Earth, its interior should still be very warm. Larger planets lose their heat from formation and radioactive decay more slowly than small planets. A planet with a larger volume than another planet of the same composition will start off with a larger supply of heat energy. In addition, the heat in a large planet's interior has a great distance to travel to reach the planet's surface and the cold outer space. The rate of heat loss increases with the surface area. A planet with a larger surface area than another planet with the same internal temperature will have a larger rate of heat loss. The time it takes for a planet to cool off depends on the total amount of heat stored/rate of heat loss or (its volume)/(its surface area). Recall from the planet volume section that the
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