An industrial water shutoff valve is designed to operate with 10 lb of effort force on the handle. The valve will encounter 150 lb of resistance force applied to a 3 in. diameter axle. What is the required actual mechanical advantage (AMA) of the system?

Awind turbine is initially spinning at a constant angular speed. as the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.173 rad/s2. after making 2870 revolutions, its angular speed is 132 rad/s. (a) what is the initial angular velocity of the turbine? (b) how much time elapses while the turbine is speeding up?

In a system, when potential energy decreases, then entropy also decreases. true false

The electric field direction is defined by the direction of the force felt by (select one of the following answers): 1. a negative charge. 2. a positive charge. 3. both positive and negative charges.