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Questions in physics

[Answered] The acceleration of an object due to gravity is 32 feet per second squared. What is acceleration due to gravity in inches per second squared? A. $\frac{3}{8}$ inches per second squared B. $2 \frac{2}{3}$ inches per second squared C. 384 inches per second squared D. 1,024 inches per second squared

[Answered] What can be observed only by observing its effects on gravity? A. dark matter B. a solar nebula C. gas and dust D. a planetesimal

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

[Answered] Which best describes reflection and refraction? A. In both reflection and refraction, rays pass through a boundary. B. In both reflection and refraction, rays bounce off a boundary. C. In reflection, rays bounce off a boundary, and in refraction, rays pass through a boundary. D. In refraction, rays bounce off a boundary, and in reflection, rays pass through a boundary.

[Answered] When is work performed? A. Work is performed when a force is applied to an object and the object moves. B. Work is performed when an object reaches a maximum velocity. C. Work is when a force is applied to an object. D. Work is performed when an object moves.

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

[Answered] A fixed non-conducting smooth track is in the shape of a quarter circle of radius R in a vertical plane. A small metal ball A is fixed at the bottom of the track. Another identical ball B, which is free to move, is placed in contact with ball A. A charge Q is given to ball A which gets equally shared by the two balls. Ball B gets repelled and ultimately comes to rest in its equilibrium position, where its radius vector makes an angle θ = 60° with vertical. Mass of ball B is m. Find charge Q that was given to the balls. (a) R√πε₀mg (b) 2R√πε₀mg (c) 3R√πε₀mg (d) 4R√πε₀mg

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

[Answered] What happens when light from the Sun passes through any type of matter? A. The light slows down. B. The light speeds up. C. Most of the light is absorbed. D. Most of the light is reflected.

[Answered] A liquid has a volume of 2000 cm³ and a mass of 24 kg. Calculate the height of the column of the liquid that exerts a pressure of 3600 N/m². The length of the side is 20 cm by 5 cm.