A single slit of width 0.030 mm is used to project a diffraction pattern of 500 nm light on a screen at a distance of 2.00 m from the slit. What is the width of the central maximum?
A. 1.7 cm
B. 3.3 cm
C. 6.7 cm
D. 1.5 mm
E. 3.0 mm
C. 6.7 cm
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The kinetic theory of gases suggests the average kinetic energy per molecule is (for a monatomic gas)
A) 1/2 kT. B) 5/2 kT. C) 3/2 kT. D) 2 kT. E) kT.
A steel ball sinks in water but floats in a pool of mercury, which is much denser than water. Where is the buoyant force on the ball greater?
A) It is the same in both cases. B) submerged in the water C) floating on the mercury D) It cannot be determined from the information given.
In 1661, who developed a definition of element that made the concept subject to laboratory investigation?
a. Berzelius b. Boyle c. Lavoisier d. Davy
Instructions: On occasion, the notation 
will be a shorthand notation for 
.
If 
= [10 m, 30°] and 
= [25 m, 130°], what is the magnitude of the sum of these two vectors?
A. 20 m
B. 35 m
C. 15 m
D. 25 m
E. 50 m