The direction of an electric field is the direction of the force exerted on
A) a neutral test charge.
B) an electron.
C) an atom.
D) a proton.
E) a molecule.
Answer: D
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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.
Other astronomers were skeptical about Percival Lowell's claims of Martian canals because
A) it did not seem possible for his telescope to see the surface through its thick atmosphere B) they discovered that Lowell suffered from poor vision C) they were able to prove that Lowell's telescope was faulty D) when they pointed their own telescopes toward Mars they couldn't see them
A computer accessory salesman attempts to convince you to purchase a "solar neutrino" shield for your new computer. (It's even "on sale"!) Why do you turn down this excellent offer?
A) Neutrinos rarely, if ever, interact with your computer. B) The Earth's natural magnetic field already offers excellent protection against the onslaught of solar neutrinos. C) Solar neutrinos are generated by solar winds, but we're in a solar minimum now, so the risk of damage is very low. D) There's no such thing as a solar neutrino.
The ancient Greek who is known for championing the concept of the atom was named ______________
Fill in the blank(s) with correct word