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Questions in physics

[Jawaban] How many pounds of restraint would a 20 lb. child need to stay restrained in a car moving at 30 mph?

[Jawaban] Explain the purpose of earthing.

[Jawaban] How long does it take a person to fall 64 feet? A. 1/3 second B. 2 seconds C. 10 seconds D. 60 seconds

[Jawaban] Which region in the list below has the highest temperature? Radiation zone Convection zone Photosphere Sunspots

[Jawaban] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Jawaban] The color of an object depends on the colors of A. the light that illuminates them. B. molecules that comprise them. C. the foreground.

[Jawaban] Which of the following are factors that determine the size of the electric potential and of electric potential energy? A. Charge and distance B. Charge and density C. Mass and charge D. Mass and distance

[Jawaban] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Jawaban] Throw a rock horizontally from a cliff 50 m high. The rock lands 80 m away from the thrower. Find the initial velocity of the rock. [2 points]

[Jawaban] Which characteristic of visible light is responsible for its color? A. amplitude B. shape C. speed D. wavelength