Describe the impact the discovery of extrasolar planets has had for understanding the origin of our own Solar System
What will be an ideal response?
The discovery of extrasolar planets shows, first and foremost, that other planets and planetary systems exist. Indeed, the statistics show that planet formation appears to be rather common. The fact that we find giant Jupiter-like planets very close to the stars demonstrates, however, that planets can move considerable distances from their birthplaces as they interact with the protostellar disk and other planets. The nebular theory of planet formation is therefore being adjusted to allow for planetary migration.
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Air at 20ºC moves over a horizontal roof at 20 cm/s. The roof is 40 m by 40 m and its temperature is 30ºC. Estimate the heat transfer by convection.
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A molecule has
A) mass. B) structure. C) energy. D) all of the above E) none of the above
Some meteorites that survive the plunge to Earth's surface contain organic compounds
Indicate whether the statement is true or false
As plant engineer, Donna purchases an electrical motor which has an output of 1500. hp. If it requires 1.20 Megawatts of electricity, what is the efficiency of the motor?
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