Which force holds the quarks together within a proton?
a) Gravity, through exchange of gravitons.
b) Proton/neutron mutual attraction forces.
c) The 'strong' force, through exchange of gluons.
d) Electromagnetic, through exchange of photons.
e) The 'weak' force, through nuclear decay.
Ans: c) The 'strong' force, through exchange of gluons.
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At approximately what time would a full Moon be on your Meridian
a) noon b) midnight c) 6pm
Orion is visible on winter evenings in the northern hemisphere but not summer evenings because of
A) interference from the full Moon. B) the tilt of Earth's axis. C) the location of Earth in its orbit. D) the precession of Earth's axis. E) baseball on television.
A gasoline engine absorbs 2500 J of heat and performs 1000 J of mechanical work in each cycle. The amount of heat expelled in each cycle is
A. 1000 J B. 1500 J C. 2000 J D. 500 J E. 3000 J
How much energy is stored in a room 3.0 m by 4.0 m by 2.4 m due to the earth's magnetic field with a strength of 5.0 × 10-5 T? (?0 = 4? × 10-7 T • m/
A) A) 570 mJ. B) 29 mJ. C) 10 mJ. D) 100 mJ.