Two small nonconducting spheres have a total charge of 93.0 μc . part a
when placed 1.14 m apart, the force each exerts on the other is 10.3 n and is repulsive. what is the charge on each?
q1,q2=

part b
what if the force were attractive?
q1,q2=

Aforce of 240.0 n causes an object to accelerate at 3.2 m/s2. what is the mass of the object?

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?