Runner a and runner b race around 1600 meters ata a different speed. Runner A travels this distance in 7 minutes and runner B travles this distance in 6 minutes and 34 seconds. Calculate the speed of both runners in meters per second.

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.

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

In science and physics what is the standard unit of measure for speed?