Newton's modification of Kepler's Laws allows us to find the ________ of the planets, if we can observe satellites in orbit about them
Fill in the blank(s) with correct word
masses
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What substances were found in the innermost regions (within about the inner 0.3 AU) of the solar system before planets began to form?
a. nothing at all b. only rocks and metals c. only hydrogen compounds d. only hydrogen and helium gases e. rocks, metals, hydrogen compounds, hydrogen, and helium, all in gaseous form
Which of the following is the most reasonable estimate of the number of characters (typed letters or numbers) in a 609-page book? Assume an average of 194 words per page and a reasonable average number of letters per word
A) 5 × 105 char B) 5 × 107 char C) 5 × 106 char D) 5 × 104 char
If an electromagnetic wave has its magnetic field oscillating in the vertical direction, the direction of oscillation of the electric field is
A) east-west. B) horizontal. C) vertical. D) north-south. E) circular.
After a switch is thrown to remove the battery from a DC LR circuit, but the circuit is still left complete, the time constant represents
a. the time rate of change of the current in the circuit. b. the time rate of change of the induced emf in the circuit. c. the magnitude of the ratio of the current to the time rate of change of the current. d. all of the above. e. only (a) and (b) above.