Replying to Physics HELP

1. An elevator weighing 2.00 x 105 N is supported by a steel cable. What is the tension in the cable when the elevator is accelerated upward at a rate of 3.00 m/s2? (g = 9.81 m/s2)

2.A bullet with a mass of 6.00 g is fired through a 1.25 kg block of wood on a frictionless surface. The initial speed of the bullet is 896 m/s, and the speed of the bullet after it exits the block is 435 m/s. At what speed does the block move after the bullet passes through it?

3.Find the final equilibrium temperature when 10.0 g of milk at 10.0°C is added to 1.60 ´ 102 g of coffee with a temperature of 90.0°C. Assume the specific heats of coffee and milk are the same as for water (C pw=4.19J/G x C) , and disregard the heat capacity of the container.