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Questions in physics

[Homework Help] Explain the purpose of earthing.

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

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

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

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

[Homework Help] 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

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

[Homework Help] 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]

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

[Homework Help] 1) A body of mass 200 kg is placed in a lift. Find the reaction between the floor of the lift and the body when the lift moves upward: i) At constant velocity ii) with an acceleration of [tex]$4.5 m / s ^2(g=10 m / g )$[/tex] Two masses are connected by a light string which passes over a fixed smooth frictionless pulley. Find the common acceleration [tex]$A$[/tex] and the tension [tex]$T$[/tex] in the string when the system is moving freely.