In a double-slit experiment, the slit separation is 2.0 mm, and two wavelengths, 750 nm and 900 nm, illuminate the slits simultaneously. A screen is placed 2.0 m from the slits
At what distance from the central maximum on the screen will a bright fringe from one pattern first coincide with a bright fringe from the other? A) 1.5 mm
B) 3.0 mm
C) 4.5 mm
D) 6.0 mm
E) 9.0 mm
C
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The A-bomb is based on
A) popcorn. B) nuclear fusion. C) radioactive decay. D) a chemical reaction. E) nuclear fission.
Galactic _______________ describes the process of a large galaxy absorbing a smaller one
Fill in the blank(s) with correct word
If an astronaut with a weight of 800 N on Earth steps on a bathroom scale while he is in Earth orbit, the scale will read
A. zero. B. less than 800 N. C. 800 N. D. more than 800 N.
Which of the following is a conservative force? (All refer to a car on a slope.)
a. The force you exert on the car pushing it uphill. b. The force exerted by rain drops falling on the car. c. The frictional force of the road on the car. d. The gravitational force acting on the car. e. The force you exert on the car (pushing it uphill) after it starts to slide downhill.