find the final velocity of the initial velocity of 8m/s with an acceleration of 7 m/s2 over 3 second interval​

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.

What type of light does this light bulb produce most (i.e. at what wavelength does the spectrum have maximum intensity)?

Which planet do you think would be easiest for humans to colonize some day?