Imagine another solar system, with a star of the same mass as the Sun. Suppose there is a planet in that solar system with a mass double that of Earth orbiting at a distance of 1 AU from the star
Thinking about Newton's version of Kepler's third law, what (approximately) is the orbital period of this planet? Explain your answer.
The orbital period of the planet would be approximately the same as that of Earth (1 year). Newton's version of Kepler's third law tells us that the orbital period of an object orbiting a much more massive object depends only upon its distance, not upon its Mass. The star is this other solar system has the same mass as the Sun. Thus, even though the planet is twice as massive as Earth, its orbit will be nearly the same as that of Earth.
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A straight wire is carrying a current upward. Observed from above (i.e., looking downward towards the wire), the magnetic field lines are
A. radially outward. B. radially inward. C. forming clockwise circles. D. forming counter-clockwise circles. E. directed toward the observer.
M dwarfs on the main sequence are brown dwarfs
a. True b. False Indicate whether the statement is true or false
Thin Lenses: Which statement about a single thin lens is correct?
A. A converging lens always produces a real inverted image. B. A diverging lens always produces a virtual inverted image. C. A converging lens sometimes produces a real upright image. D. A diverging lens always produces a virtual upright image. E. A diverging lens produces a virtual upright image only if the object is located between the lens and its focal point.
Oceanic thermal generation operates from a relatively inexhaustible source of energy in the oceans that have heat energy from
A. subatomic heat. B. the decay of carbon in the rock formations underlying Earth's oceans. C. the energy in sunlight. D. carbon dioxide in the ozone layer.