Two charged spheres on a frictionless horizontal surface are attached to opposite ends of a string & are in static equilibrium. the 30 kg red sphere has more charge than the 8 kg green sphere. the total charge magnitude on the spheres is 1171 μc & they have the same polarity. as a result the tension is 5062.5 n & the centers of the spheres are 0.78 m apart. determine the charge magnitude on each sphere.

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.

Steam enters an adiabatic diffuser at 150 kpa and 1208c with a velocity of 550 m/s. determine the minimum velocity that the steam can have at the outlet when the outlet pressure is 300 kpa.

Choose all the answers that apply. our solar system: is in a spiral galaxy no longer includes pluto is made mostly of empty space is in the andromeda galaxy is the only known system that supports life