The competition between the electrostatic force between the protons in a nucleus and the strong nuclear force determines whether a nucleus is stable
Indicate whether the statement is true or false
TRUE
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The mass density of pure water is If the molecular mass of water is 18.0 u, how many water molecules are in spherical water balloon of radius 1.0 cm?
A.
B.
C.
D.
The greater proportion of energy immediately converted to heat rather than light occurs in
A) a fluorescent lamp. B) an incandescent lamp. C) both of these D) neither of these
Uranus was discovered
A) after examining perturbations in Neptune's orbit. B) less than 250 years ago. C) thousands of years ago. D) by Galileo. E) with a radio telescope.
Two tiny grains of sand having charges of 4.0 ?C and -4.0 ?C are situated along the x-axis at x1 = 2.0 m and x2 = -2.0 m
What is electric potential energy of the system of these grains assuming that at infinity the energy of the system is zero? (k = 1/4??0 = 9.0 × 109 N ? m2/C2 ) A) -36 mJ B) 36 mJ C) 0 J D) -72 mJ E) 72 mJ