Light of wavelength 687 nm passes through a single slit that is 0.75 mm wide. At what distance from the slit should a screen be placed so that the second dark fringe in the diffraction pattern is to be 1.7 mm from the center of the pattern?
A) 1.9 m B) 1.5 m C) 0.93 m D) 1.1 m E) 0.39 m
C
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A long wire carries a current toward the east in a magnetic field that is directed due south. What is the direction of the magnetic force on the wire?
a) west b) north c) east d) vertically upward e) vertically downward
Organisms whose cells lack a nucleus are called
A) prokaryotes B) eukaryotes C) non-nucleotes D) karyokes
A car's motor gives out just at the bottom of a big hill, but the car starts coasting up the hill. In what direction is the acceleration of the car just as it stops momentarily before rolling back down the hill?
What will be an ideal response?
A fluid can be:
a. a liquid but not a solid or a gas. b. a solid but not a liquid or a gas. c. a gas but not a liquid or a solid. d. a gas or a liquid but not a solid. e. a liquid or a solid but not a gas.