An infinitely long thin wire carrying linear charge density λ is brought close to a semi-infinite neutral conductor which covers space for x < 0. The wire is a distance d away and is oriented so that it is parallel to the y − axis. Calculate the force per length ` that acts on the wire.

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge