Physics Answers

A pendulum of length 0.99m is taken to the moon by an astronaut. The period of the pendulum is 4.9s. what is the value of g on the surface of the moon?

Pressure is often measured in units of atmosphere. To what depth must you swim to experience 3.0 atm pressure?

A typical pool is 3.0 m deep. What is the water pressure at the bottom of the pool?

Calculate the kinetic energy of a toy car of mass 2 kg with a speed of 1m/s

An engine raises 100kg of water through a height of 60m in 20s. what is the power of the engine​

1- Ifg represents pressure gradient P/L, n represents coefficient of viscosity, a represents radius of the pipe and Q represents volume of liquid issuing per second, then the integers x,y and z, such that Q a n av g², may be (where P is the pressure difference between the ends of the pipe and L is its length).

a) x = 1, y 4, z= -1

b) x= -1, y =4, z = 1

c) x 1, y =-4, z=-1

d) x=-1, y = 4, z =-1

A weight of 30 N is supported by two strings AB and AC of lengths 0.5 m and 1.2 m respectively. If BC is horizontal and of length 1.3 m, calculate the tension in AC and the angle BCA. A diagram is required with the solution.

Nasa is expected to send a 2600 kg satellite 450 km above the earth surface.

A) what is its radius?

B) what speed will it have?( Hint: earth mass is 5.97 x 10²⁴ kg)

C) what is its orbital period?

D) what is its radial acceleration?

A basketball of mass 0.0400 kg is dropped from a height of 5.00 meters to the ground and bounces back to a height of 3.00 meters .

A. On its way down, how much potential energy does the ball lose?

B. On its ways, how much potential energy does the ball regain?

How much potential energy does a car gain if a crain lifts the car with a mass of 1,500 kg and 20 meters straight up?