The two strongest forces that act between protons in a nucleus are
A) the weak nuclear and electromagnetic forces.
B) the weak nuclear and the gravitational forces.
C) the electrostatic and the gravitational forces.
D) the strong nuclear and the electrostatic forces.
D
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A mega-parsec is equivalent to
a. 3.26 light-years. b. 206,265 AU c. the age of our solar system d. a million parsecs. e. the diameter of the Milky Way galaxy.
Holograms employ the principle of
A) diffraction. B) interference. C) both of these D) neither of these
A seesaw made of a plank of mass 10.0 kg and length 3.00 m is balanced on a fulcrum 1.00 m from one end of the plank. A 20.0-kg mass rests on the end of the plank nearest the fulcrum
What mass must be on the other end if the plank remains balanced? A) 6.67 kg B) 7.50 kg C) 10.0 kg D) -10.0 kg E) 5.00 kg
The molecular formula of "buckyball" is ______________
Fill in the blank(s) with correct word