What electric charge is characteristic for an ion of O?
a. 6+
b. 0
c. 2–
d. 2+
c
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A girl throws a rock horizontally, with a velocity of 10 m/s, from a bridge. It falls 20 m to the water below. How far does the rock travel horizontally before striking the water, assuming negligible air effects?
A) 14 m B) 16 m C) 20 m D) 24 m
Charge of a uniform density (8.0 nC/m2) is distributed over the entire xy plane. A charge of uniform density (5.0 nC/m2) is distributed over the parallel plane defined by z = 2.0 m. Determine the magnitude of the electric field for any point with z = 1.0 m
a. 0.45 kN/C b. 0.17 kN/C c. 0.28 kN/C d. 0.73 kN/C e. 0.62 kN/C
The Hubble Law is a relation between a galaxy's
a. mass and its luminosity. b. distance and its luminosity. c. mass and its recession velocity. d. distance and its recession velocity. e. mass and its diameter.
To which of the following values of n does the shortest wavelength in the Balmer series correspond?
A) 3 B) 5 C) 7 D) 1 E) ? (very large)