Light behaves like
a. a wave at times, and a particle at other times.
b. a wave. c. a particle. d. both a wave and a particle, because of its dual nature.
A
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A bullet fired horizontally hits the ground in 0.5 s. If it had been fired with twice the velocity it would have hit the ground in
A) less than 0.5 s. B) more than 0.5 s. C) 0.5 s.
The main reason for positioning many radio telescopes across a large area and combining the signals is
a. to observe more objects in a shorter amount of time. b. provide a backup system if one or more of the telescopes go down. c. to produce higher resolution images. d. to avoid interference between signals from the separate telescopes. e. to account for the motion of objects in the sky as a result of the Earth's rotation.
The change in entropy is Q/T for
A) all processes. B) reversible processes. C) irreversible processes. D) all real engines. E) exothermic processes.
Which has the thicker lamp filament, a 60-W incandescent bulb or a 100-W incandescent bulb?
What will be an ideal response?