A 0.58-kg block sits on a lab table. The block accelerates to the right at a rate of 4.48 m/s/s There is a forward force of 3.89 N. What is the force pulling the block backwards?

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

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.

If you wanted to move an electron from the positive to the negative terminal of the battery, how much work w would you need to do on the electron? enter your answer numerically in joules.