Two thin converging lenses A and B have focal lengths fA and fB, respectively. Lens A has a shorter focal length than Lens B. A collimated laser beam travels down an optical axis from left to right. How must the two lenses be arranged on the optical axis so that the laser beam emerges from the pair of lenses collimated with an increased diameter

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.

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

Which process is represented by the pv diagram? a. the isobaric process b. the isovolumetric process c. the isothermal process d. the adiabatic process