The concept of hydrostatic equilibrium is critical to understanding how the Sun has remained stable long enough for live to evolve here
Indicate whether the statement is true or false
TRUE
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The Moon always keeps the same side facing Earth and therefore Earth always keeps the same side facing the Moon
a. True b. False Indicate whether the statement is true or false
The "Grand Tour" of all four jovians was conducted by:
A) Galileo. B) Cassini. C) Pioneer 11. D) Voyager 1 and 2 both. E) Voyager 2.
Suppose that the star Betelgeuse (the upper left shoulder of Orion) were to supernova tomorrow (as seen here on Earth). What would it look like to the naked eye?
A) Betelgeuse would suddenly appear to grow larger in size, soon reaching the size of the full Moon. It would also be about as bright as the full Moon. B) Betelgeuse would remain a dot of light, but would suddenly become so bright that, for a few weeks, we'd be able to see this dot in the daytime. C) We'd see a cloud of gas expanding away from the position where Betelgeuse used to be. Over a period of a few weeks, this cloud would fill our entire sky. D) Because the supernova destroys the star, Betelgeuse would suddenly disappear from view.
A rigid body is rotating counterclockwise about a fixed axis. Each of the following pairs of quantities represents an initial angular position and a final angular position of the rigid body. Which of the sets can only occur if the rigid body rotates through more than 180°?
1.3 rad, 6 rad 2.-1 rad, 1 rad 3.1 rad, 5 rad