In a fusion reaction,

a) light nuclei form heavier nuclei.
b) heavier nuclei disintegrate into lighter nuclei
c) the breeding of more fissionable material takes place.
d) the fuel used must be naturally radioactive.


a

Physics & Space Science

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In general, the ________ lunar craters sit atop the mare

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Projectile Motion: A girl throws a rock horizontally with a speed of 12 m/s from a bridge. It falls 2.28 s before hitting the water below. Neglect air resistance.(a) How high is the bridge from the water below?(b) How far horizontally does the rock travel before striking the water?

Fill in the blank(s) with the appropriate word(s).

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An optical system comprises in turn, from left to right: an observer, a lens of focal length +30 cm, an erect object 20 mm high, and a convex mirror of radius 80 cm

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There is no obvious evidence for large-scale structure greater than about

A) 200 kpc. B) 600 kpc. C) 200 Mpc. D) 600 Mpc. E) 2000 Mpc.

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