A car travels for 10s at a steady speed of 20m/s along a straight road. the traffic lights ahead change to red and the car slows down with a constant deceleration so that it halts after a further 8s. a. draw a a speed-time graph to represent the car's motion during the 18 seconds described.
b. use the graph to deduce the car's celebration as it slows down.
c. use the graph to deduce how far the car travels during the 18s described.

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.

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.

See the attachment and solve question 5th