A hydraulic lift is used to lift a 970kg car 12cm off the floor. The diameter of the output piston is 18cm and the input force is 250N. (a) what IS the area of the input piston?

(b)what is the work done in lifting the car 12cm?

(c)calculate the pressure transmitted in the hydraulic system?
Please show all ur working out.

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Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?