As an interstellar gas cloud shrinks in size, the law of conservation of angular momentum predicts it will
A) heat up.
B) slow down in its rotation.
C) cool off.
D) continue shrinking.
E) rotate faster.
E) rotate faster.
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Answer the following statement true (T) or false (F)
Two long parallel wires that are 0.40 m apart carry currents of 10 A in opposite directions
What is the magnetic field strength in the plane of the wires at a point that is 20 cm from one wire and 60 cm from the other? (?0 = 4? × 10-7 T ? m/A) A) 3.3 µT B) 67 µT C) 33 µT D) 6.7 µT
Acceleration is greater for a satellite when it is at the
A) apogee (farthest point). B) perigee (closest point). C) zenith. D) same acceleration at all of the above places.
The energy level diagram for hydrogen
The energy of a photon emitted in a transition from the n = 3 state to the n = 2 state is __________.