Which of the following particles are leptons?
a. Mesons and baryons.
b. Mesons and neutrinos.
c. Electrons and neutrinos.
d. Muons and baryons.
e. Tau and mesons.
c
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When you vigorously shake a can of chicken broth, you
A) are doing work on the broth. B) increase the temperature of the broth. C) both of these D) neither of these
A fish is 80 cm below the surface of a pond. What is the apparent depth (in cm) when viewed from a position almost directly above the fish? (For water, n = 1.33.)
a. 50 b. 60 c. 40 d. 70 e. 110
The point in time at which oxygen started to build up in the Earth's atmosphere is referred to as the
A) great oxidation event B) great oxygen crisis C) great oxygenation event D) great photosynthetic event
A singer is farsighted and cannot see objects clearly that are closer than 80.0 cm from his unaided eye. What is the refractive power of the contact lenses that will move his near point to a distance of 25.0 cm from his eye?
A) 2.75 diopters B) -2.75 diopters C) -4.72 diopters D) 4.72 diopters E) 7.00 diopters