How much heat does it take to melt a 0.234 kg ice cube at its melting point?

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.

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z