If you increase the frequency of a sound wave four times, what will happen to its speed? a. the speed will increase four times. b. the speed will decrease four times. c. the speed will remain the same. d. the speed will increase twice. e. the speed will decrease twice. reset

An electric current is flowing through the cord below.what will happen to this current if a magnet is brought near the cord? a. the electric current will stop flowing. b. it will exert a force on the voltage. c. the resistance of the wire will decrease. d. it will exert a force on the electric current.

Why should seat belts not be mandatory quick plz

Based on the concept of the wave-like nature of light, huygens' theory of light postulates that the more light was "bent" by a substance the slower it would move while traversing across that substance. a) deflection b) interference c) refraction d) resonance