A solid cylinder with a radius of 10 cm and a mass of 3.0 kg is rotating about its center with an angular speed of 3.5 rad/s. What is its kinetic energy?
A) 0.18 J
B) 0.092 J
C) 0.96 J
D) 1.05 J
E) 0.53 J
B
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The production of exotic ____ particle pairs in the core of a high-mass star has a significant effect on the fusion of heavy elements
a. electron-positron b. electron-proton c. proton-antiproton d. neutrino-antineutrino e. baryon-antibaryon
If we place living cells in a nonpolar solvent like methane or ethane,
A) their membranes will thicken, preventing molecular transport across the membrane B) they will rapidly explode due to pressure caused by the solvent building up inside the cell C) their membranes will most likely dissolve as cell membranes are also nonpolar D) they will function in much the same way as they do in water
You are holding on to one end of a long string that is fastened to a rigid steel light pole. After producing a wave pulse that was 5 mm high and 4 cm wide, you want to produce a pulse that is 6 cm wide and 7 mm high. You must move your hand up and down once,
a. the same distance up as before, but take a shorter time. b. the same distance up as before, but take a longer time. c. a smaller distance up, but take a shorter time. d. a greater distance up, but take a longer time. e. a greater distance up, but take the same time.
The figure shows a distance vs. time graph of an object with three distinct regions, I, II, and III
?
The object’s velocity is negative in region(s)
a.
I.
b.
II.
c.
III.
d.
no regions