Physics Answers

A 7.70-kg steel ball at 18.7°C is dropped from a height of 12.7 m into an insulated container with 4.50 L of water at 10.1°C. If no water splashes, what is the final temperature of the water and steel? The specific heat of steel and water is 450 J/(kg·K) and 4186 J/(kg·K) respectively.

A monatomic ideal gas at 27.0°C undergoes a constant volume process from A to B and a constant-pressure process from B to C.

where P1 = 2.70, P2 = 5.40, V1 = 2.70, and V2 = 5.40.

Find the total work done on the gas during these two processes.

A spring with a constant of 200 N/m stretches by 0.03m. What is the potential energy of the spring

The distance S in metres covered by particle at time T, seconds is given by S= 2t²– 3t² – 5t, find:

(i) it's speed In the 5th second.

(ii) the distance covered in the 3rd second.

(iii) the acceleration at T=5 seconds.

How much force is needed to punch a circular hole 1.2cm in radius in a metal plate of thickness 0.3 cm? The shear modulus of the metal is 150.0 x 106 N·m

A rock is thrown upwards with a speed of 7m/s. How much time does it take to reach the peak of its arc

a car travelling at 22.5m/s decelerate at 2.27m/s². how far does it go in third minutes after the brakes were applied

A pole-vaulter approaches the takeoff point at a speed of 9.00 m/s. Assuming that only this speed determines

the height to which he can rise, find the maximum height at which the vaulter can clear the bar. (4.13m)

What is the total thermal energy of 1 mol of an ideal monatomic gas at a temperature of 0°C? 

Find the resistance of a circuit runs with 20 A and 54.2 nV