Physics Answers

The diameter of the large piston of a hydraulic press is 20 cm, and the area of the small piston is 0.50 cm2. If a force of 400 N is applied to the small piston, (a) what is the resulting piston? (c) Underneath the large piston?

an unknown mass is attached to the end of an ideal spring with a force constant 100 N/m. the mass vibrates in SHM with a frequency of 5.0 hz. find (a ) the period of oxcillation ,(b) the angular frequency, and (c) the mass of the body

The electron drift arises due to the force experienced by electrons in the electric field inside the conductor.

But force should cause acceleration.

Why then do the electrons aquire a steady average drift speed?

1. calculate the momentum of a 0.15 kg ball that is moving northwards towards home plate at a velocity of 40 m/s.
2. a 100 kg car strikes a tree at 30.0 km/h and comes to a stop in 0.15 s. Determine the following:

  a. What is the car's initial momentum?

b. What is the average force on the car while the car is being stopped?

1. A 50 kg mass is sitting on a frictionless surface. an unknown constant force pushes the mass for 2 second until that mass reaches a velocity of 3 m/s.

a. what is the initial momentum of the mass?

b. what is the final momentum of the mass?

c. what was the force acting on the mass?

d. what was the impulse acting on the mass?

An irigation canal has a rectangular cross-section of 5 m width and 1.2 m depth. If water flows at a speed of 0.8 m/s, what is its flow rate? 

 The blood flows from the aorta of radius 1.0 cm to the millions of capillaries whose total cross section is 0.07 m2. The average speed of the blood flowing in these capillaries is 9 x 10－4 m/s. Calculate the speed flowing through the aorta. 

A water pipe narrows from a radius of r1 = 4.99 cm to a radius of r2 = 2.75 cm. If the speed of the water in the wider part of the pipe is 1.31 m/s, what is the speed of the water in the narrower part? 

Connor runs for 50s at of 15m/s. How far does he go?

Fing the band width of fringes in an air wedge formed by 2 glass plate of length 30 cm spaced 0.042 mm at one end, wave length-590 nm