Two carts have a compressed spring between them and are initially at rest. one of the carts has total mass, including its contents, of 5.0 kg, and the other has total mass of 3.0 kg. if the 3.0 kg cart is moving at 3.0 m/s after the spring is allowed to push the carts apart, what is the velocity of the 5.0 kg cart after release? the system is closed. a) -1.8 m/s b) -5.0 m/sc) -0.56 m/sd) -0.0 m/s

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island