six identical vertical metal bars start at the positions shown below and move at constant velocities through identical magnetic fields. the bars make electrical contact with and move along frictionless metal rods attached to light bulbs.

Wo audio speakers are placed on a vertical rail. speaker a is placed at head-level while speaker b is place at some variable height, \delta yδy, above speaker a. both speakers receive simultaneous input from a sine-wave generator so the speakers each produce a pure sinusoidal sound wave with a wavelength of 0.531 meters. calculate the lowest height that speaker b can be placed above speaker a to produce a minimum of sound heard by person standing \delta x = 7.86δx=7.86 meters directly in front of speaker a.

Velocity is a description of both speed and direction, therefore it - a vector - a force arrow - the same as acceleration - a magnitude

Acar is traveling 35 mph on a smooth surface . if a balanced force is applied to the car what happens?