Cyclist A, who has constant speed 4.0 m s−1, overtakes cyclist B, who is stationary, at time t=0. 2.0 seconds later, cyclist B begins to accelerate uniformly at 1.0 m s−2.

Calculate the time at which cyclist B overtakes cyclist A.

Give your answer to an appropriate number of significant figures.

How much heat is required to convert 0.3 kg of ice at 0°c to water at the same temperature

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.

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.