When light passes through two or more narrow slits, an alternating dark and bright pattern is observed on a screen because of __________
Fill in the blank(s) with correct word
interference
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The free-fall contraction of a molecular cloud
a. can be initiated by shock waves from supernovae. b. can be initiated by nearby spectral type G stars. c. can be initiated by the rotation of the cloud. d. causes the cloud to become transparent to ultraviolet radiation. e. causes the particles in the cloud to decrease the speed with which they move.
Find the change in entropy (in J/K) when 5.00 moles of an ideal monatomic gas are allowed to expand isobarically from an initial volume of 20 cm3 to a final volume of 100 cm3
a. 167 b. 100 c. 67 d. 52 e. 152
Energy Levels: The energy difference between adjacent orbit radii in a hydrogen atom
A. increases with increasing values of n. B. decreases with increasing values of n. C. remains constant for all values of n. D. varies randomly with increasing values of n.
Two masses are connected by a string which passes over a pulley with negligible mass and friction. One mass hangs vertically and one mass slides on a 30.0 degrees incline. The inclined surface has a coefficient of kinetic friction of 0.200. The vertically hanging mass is 4.00 kg and the mass on the incline is 6.00 kg. The acceleration of the 4.00 kg mass is (the initial velocity of the 6.00 kg mass is up the incline)
A. 7.16 
B. 5.84
C. 2.98
D. 1.53
E. 3.90