Describe two methods that have already been used to study extrasolar planets, and which one gives us the most information
What will be an ideal response?
Most have been detected by the Doppler shifts they induce in the motion of their home stars, with the periodicity of these shifts telling us their periods. But in the cases where the planet transits its sun, the timing of this light loss gives us the actual masses, sizes, and even densities of the transiting planets.
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In the context of Uranus's rings, the passage of the planet in front of a star is referred to as a(n) _____
A) ablation B) blueshift C) occultation D) fasciculation
When carbon and oxygen atoms combine, energy is
A) absorbed by the reaction. B) released by the reaction. C) not involved.
Dark matter is made of
A) slow-moving "magnetons" that were created during the big bang. B) fast moving "gluons" that were created during the big bang. C) Both of the above. D) an unknown material that has never been directly observed in laboratories. E) soap bubbles.
A light board that is 10 m long is supported by two sawhorses, one at one end of the board and a second at the midpoint. A 40-N weight is placed between the two sawhorses, 3.0 m from the end and 2.0 m from the center
What magnitude forces do the sawhorses exert on the board?