Three men are pulling on a tree attached with ropes to keep it from falling down. if one man is pulling the rope with a force of 370n acting at 30 degrees east of north and the second man is pulling with a force of 280n acting at 70 degrees west of south. what force should the third man pull with and in what direction?and explain you so much

Two large, flat, horizontally oriented plates are parallel to each other, a distance d apart. half way betwween the two plates the electric field has magnitude e. if the separation of the plates is reduced to d/2 what is the magnitude of the electric field half way between the plates?

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.

Apossible explanation for a set of facts that can be tested by further investigation is called