Enforce laws
What will be an ideal response?
enforcement, review of laws
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What two quantities are constant in uniform circular motion? ______________ and ______________
Fill in the blank(s) with correct word
While on the main sequence a star's primary energy source comes from
a. nuclear fusion. b. nuclear fission. c. gravitational potential energy. d. magnetic fields.
Two speakers are emitting coherent sound waves at a frequency of 440 Hz. If the speed of sound is 343 m/s, and it is observed that no sound is heard a distance of 17.2 m from one speaker, which of the following is a possible distance to the second speaker?
A. 14.6 m B. 17.2 m C. 19.6 m D. 18.8 m E. 16.5 m F. 18.0 m
How come birds can land on overhead power lines without getting electrocuted?
a. Their feet are good insulators. b. They are saved by their small size. c. Both their feet are on the same wire, so they don't complete a circuit. d. They are just lucky, I guess.