Describe at least three ways in which our solar system would be different if orbital resonances had never been important
What will be an ideal response?
Many possible answers; without orbital resonances: (1 ) The asteroids might have accreted into a single planet between Mars and Jupiter. (2 ) Comet orbits would not be nudged, so comets would not collide as frequently with Earth. (3 ) From the previous two ideas, Earth would not have been as heavily impacted. (4 ) Earth would not have received as many volatiles from the outer solar system. (5 ) Saturn's rings would not be broken into rings and gaps. (6 ) The asteroid belt would not have gaps. (7 ) Kuiper-belt objects would not clump into orbital groups. (8 ) Pluto and other Kuiper-belt objects would not be prevented from colliding with Neptune. (9 ) Io, Europa, and Ganymede would not be geologically active.
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Free Fall: A rock is projected upward from the surface of the Moon, at time t = 0 s, with an upward velocity of 30.0 m/s. The acceleration due to gravity at the surface of the Moon is 1.62 m/s2, and the Moon has no atmosphere. The height of the rock when it is descending with a speed of 20.0 m/s is closest to
A. 115 m. B. 125 m. C. 135 m. D. 145 m. E. 154 m.
Which of the following radiations has the longest wavelength?
a. Infrared b. Visible c. Ultraviolet d. X-rays
When air is cooled below its dew point without condensation, it is said to be
a. wet. b. dry. c. supersaturated. d. unsaturated.
The brakes in a car work because of Pascal's principle
Indicate whether the statement is true or false