A solution with a pH of 1 is
a. strongly acidic.
b. weakly basic.
c. strongly basic.
d. weakly acidic.
a
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If the rotation rate of a generator coil is doubled, what happens to the peak emf?
A. it stays the same B. it doubles C. it quadruples D. it halves E. it quarters
An object is placed 5 cm to the left of a converging spherical lens. The lens has a focal length of f = 10 cm. What kind of image is formed and what is its orientation?
a. Real/Upright b. Virtual/Upright c. Virtual/Inverted d. Real/Inverted
Doubling only the spring constant of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?
A) increases the energy by a factor of square root of two B) increases the energy by a factor of two C) increases the energy by a factor of three D) increases he energy by a factor of four E) produces no change
The most important effect in clearing the solar nebula of gas and dust was
a. impacts by planetesimals. b. the solar wind. c. the Sun's magnetic field. d. the asteroid belt. e. radiation pressure.