Physics Answers

In a copper wire of diameter 2mm, 3×10²³ electrons flow in one second. Calculate the current

a solid conducting sphere with an area of 16m² has total charge of 4"\\mu C." Determine the electric field through the Gaussian surface

A boy moves from point A in distance 20m in the direction North 60° East to arrive at point B in a direction North 30° East for point C,10m away from point B.What is it vector location from point A?

The screen of a pinhole camera is a square, of side 0.16m and it is 0.15m behind the pinhole. The camera is placed11m from a flag staff and positioned. The image occupies three-quaters of the height of screen. What is the height of the flag staff? What is the disadvantage of a pinhole camera compared to a lens camera.

A flat circle of radius 20 mm is placed in a uniform electric field of magnitude 20500 m N/C. What us the electric flux through the circle when its face is at 33 degree to the field lines?

Motion under inverse square law force derivation

Considering the encircle part of the pumping system as shown below. Assuming a fresh water flowing in the discharge pipe with a velocity of 5 m/s.

A 4.5 C charge requires an 8.0 J to move it from point X to Y, where the potential

difference is 1.5 V. Calculate (a) the potential difference between points X and Y. (b) the

potential at point Y.

What is the magnitude of the electric force of attraction between an iron nucleus

(q = −26e) and its innermost electron if the distance between them is 1.5 × 10−12m?

Dynamic viscosity of oil used for lubrication between a shaft and a sleeve is 0.8Ns/m². The shaft is of d=0.5m and rotates at 190rpm. Calculate the horsepower lost in bearing for a sleeve length of 0.1m. Thickness of oil film is 2mm