Which best summarizes a concept related to the work-energy theorem? When work is positive, the environment does work on an object.
When work is negative, the environment does work on an object.
When work is positive, the kinetic energy in a system remains constant.
When work is negative, the kinetic energy in a system remains constant.
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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.

Acoyote chasing a rabbit is moving 8.00 m/s due east at one moment and 8.80 m/s due south 4.25 s later. let the x axis point due east and the y axis point due north. find the direction of the coyote's average acceleration during that time.

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?