What is the pressure at a depth of 3.0m below the surface of a liquid of density 1200kgm-3? (g = 10Nkg-1)

A2000 kg car is rounding a curve of radius 200 m on a level road. the maximum frictional force the road can exert on the tires of the car is 4000 n. what is the highest speed at which the car can round the curve?

Place me with this question is my last question

The field between two charged parallel plates is kept constant. if the two plates are brought closer together, the potential difference between the two plates either a) decrease b) does not change c) increase?