A diver shines light upward to the surface of a smooth pond at 20° to the normal. Most light passes into the air above while the part that reflects back into the water makes an angle to the normal of
A) less than 20°.
B) 20°.
C) more than 20°.
D) all refracts, none reflects.
Answer: B
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A) positively charged. B) negatively charged. C) both D) neither
The solar neutrino experiments detect about twice as many neutrinos as theory predicts should be detected
Indicate whether the statement is true or false
A magnetic dipole has two stable orientations in a magnetic field. At what two angles relative to the magnetic field direction are these orientations?
a) 0° and 90° b) 0° and 180° c) 90° and 270° d) 45° and 135° e) 45° and 90°
The proton contains which of the following combination of quarks?
a. two up quarks and one down quark b. one up quark and two down quarks c. one top quark and two bottom quarks d. two top quarks and one bottom quark