The velocity required to escape an astronomical body is known as the _______________
Fill in the blank(s) with correct word
escape velocity
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Graphical Analysis: The graph in the figure shows the position of a particle as it travels along the x-axis. What is the magnitude of the instantaneous velocity of the particle when t = 1.0 s?
Fill in the blank(s) with the appropriate word(s).
If you could watch a time-lapse movie of the interstellar medium over hundreds of millions of years, what would you see?
A) Gas that changes only in very slow and steady ways, so that the movie would in fact be quite boring. B) The entire disk of the Milky Way would pulsate in and out as it contracts to form stars and then blows out in supernovae and then contracts to form stars again and so on. C) The movie would alternate back and forth between being very bright when there is a lot of gas and very dark when there is very little gas. D) Gas that is often moving at high speed, particularly after one or more supernovae, and constantly changing form between molecular clouds, atomic hydrogen, and hot, ionized bubbles and superbubbles.
Two stars of masses M and 6M are separated by a distance D. Determine the distance (measured from M) to a point at which the net gravitational force on a third mass would be zero
a. 0.41 D b. 0.33 D c. 0.37 D d. 0.29 D e. 0.14 D
The existence of the world's subtropical deserts (such as the Sahara) is primarily due to
A) warm ocean currents. B) strong prevailing northwesterly winds. C) extremely high temperatures. D) belts of atmospheric high pressure.