An object moves at a constant velocity of 12 m/s to the southwest for an interval of 20 s. Halfway through this interval, what is the magnitude of its instantaneous velocity?
a. It can be any value from 0 to 24 m/s.
c. 12 m/s
b. 6 m/s
d. More information is needed.
C
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Increasing the wavelengths in a double-slit experiment has what effect on the position of maxima on a screen at fixed distance?
A. none B. maxima get closer together C. maxima get farther apart D. maxima get cancelled by minima E. maxima pass minima on the screen
Standing waves of sound are employed in a
A) guitar. B) flute. C) clarinet. D) all of the above E) none of the above
One function of concave mirrors is:
a. to focus light. b. to make light more diffuse. c. to curve light beams. d. to serve as wide view mirrors. e. to scatter light.
The strong force is the force that
a. binds electrons to the nucleus in an atom. b. holds the Moon in orbit around Earth. c. creates the magnetic field associated with sunspots. d. produces the extremely high temperatures in the solar corona. e. binds protons and neutrons together to form a nucleus.