Nuclear fission is the process by which
A) a number of smaller nuclei combine to form a larger nucleus with the release of energy
B) electrons are rearranged inside an atom, releasing energy
C) an electron is ejected from the nucleus of an atom, releasing energy
D) large nuclei break up into smaller nuclei with the release of energy
D
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A diver shines an underwater searchlight at the surface of a pond (n = 1.33). At what angle (relative to the surface) will the light be totally reflected?
a. 47.3° b. 41.2° c. 51.1° d. 58.7° e. 49.8°
Water is being sprayed from a nozzle at the end of a garden hose of diameter 2.0 cm. If the nozzle has an opening of diameter 0.50 cm, and if the water leaves the nozzle at a speed of 15 m/s, what is the speed of the water inside the hose?
a. 0.63 m/s c. 2.5 m/s b. 0.94 m/s d. also 10 m/s
A simple magnifier of refractive power 15.0 D is used to observe a beetle on a student’s desk. If the image of the beetle is twice as large as the beetle itself, where is the image formed relative to the lens?
A. 4.5 cm B. 8.3 cm C. 5.0 cm D. 3.6 cm E. 5.6 cm
Which star is the furthest away if all have the same apparent brightness?
a) type G main sequence star b) type F main sequence star c) type M main sequence star d) type A main sequence star e) white dwarf