What are the quarks really called?
A.) Sleepy, Dopey, Grumpy, Sneezy, Bashful, and Doc.
B.) Electron, proton, photon, positron, meson, and muon.
C.) Charm, strange, anger, hope, peace, and love.
D.) Up, down, top , bottom, strange, and charm.
E.) Gluon, W+ boson, W- boson, Z boson, graviton, and photon.
Ans: D.) Up, down, top , bottom, strange, and charm.
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Which statement best describes the surface of Io?
a. dark and dirty ice, heavily pocked with craters b. old and dark on some portion, but cratered with a young bright grooved terrain c. icy crust free of craters with a liquid water ocean beneath d. covered in active sulfur-based volcanoes e. mostly water ice mixed with methane
The figure shows a distance vs. time graph of an object with three distinct regions, I, II, and III
?
The object’s velocity is never negative.
a.
True
b.
False
Two identical balls are at rest side by side at the bottom of a hill. Some time after ball A is kicked up the hill, ball B is given a kick up the hill. Ball A is headed downhill when it passes ball B headed up the hill. At the instant when ball A passes ball B,
a. it has the same position and velocity as ball B. b. it has the same position and acceleration as ball B. c. it has the same velocity and acceleration as ball B. d. it has the same displacement and velocity as ball B. e. it has the same position, displacement and velocity as ball B.
A room has 110 ft2 of floor space. What is the approximate volume of the room? (You will need to make a reasonable estimate of a missing physical quantity.)
a. 103 ft3 c. 105 ft3 b. 104 ft3 d. 106 ft3