The ____ is responsible for binding the electrons to the nucleus
a. Kirchhoff's law
b. ground state
c. temperature
d. Coulomb force
e. Balmer series
d
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What will be an ideal response?
An observer in the Northern Hemisphere watches the sky for several hours. Due to the motion of Earth, this observer notices that the stars near the north celestial pole appear to move
a. counter clockwise around the celestial pole. b. clockwise around the celestial pole. c. from left to right. d. from right to left. e. nearly vertically upward.
The energy required to accelerate a ship the mass of an ocean liner to a cruising speed of 10% of the speed of light is approximately
A) one million times the Earth's current annual energy usage B) one hundred times the Earth's current annual energy usage C) equal to the Earth's current annual energy usage D) ten times the Earth's current annual energy usage
Transverse waves y1 = A1 sin(k1x??1t) and y2 = A2 sin(k2x??2t), with A2>A1, start at opposite ends of a long rope when t = 0. The magnitude of the maximum displacement, y, of the rope at any point is
A.
B.
C.
D.
.E.
.