Apiano is being pushed up a frictionless ram that makes a 25 degree angle with the floor. if the piano weighs 510 pounds and the force pushing the piano up the ramp is 240 pounds what is the acceleration of the piano?

An object moves from the position +34m to the position -15m in 15 seconds. what is it's total displacement? what is it's average velocity?

How can you increase the strength of an electromagnet?

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.