Why is Pluto now considered to be a Kuiper-belt object?
What will be an ideal response?
The distance, ellipticity, and inclination of Pluto's orbit are all similar to those of Kuiper-belt objects. Pluto's icy composition is also similar to Kuiper-belt objects. Pluto is in an orbital resonance with Neptune, like many Kuiper-belt objects.
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An 18.0 pm wavelength photon is scattered by a stationary electron through an angle of 120°. The wavelength of the scattered photon, in pm, is closest to:
A) 19.2 B) 20.4 C) 21.6 D) 22.9 E) 24.1
If the pencil you are holding were 10 times as long and 10 times as wide, its surface area would be multiplied by
1) 10 2) 100 3) 1000 4) 10,000 5) none of these and its volume would be multiplied by 6) 10. 7) 100. 8) 1000. 9) 10,000. 10) none of these.
If the Earth was moved twice as close to the Sun, how would the force of gravity by the Sun on the Earth change?
A) It would be two times weaker. B) It would be unchanged. C) It would be four times weaker. D) It would be two times stronger. E) It would be four times stronger.
Almost every action performed by a living cell is carried out by:
A) physical forces within each cell. B) chemicals it manufactures. C) gravitational forces within each cell. D) electric impulses transmitted by each cell.