Physics Answers

Explain what is fluid.

John needs to find the mass of a larger steel bolt but does not have access to a balance. He knows that the density of steel is 8050kg/m^3.
Describe how can he accurately find the mass of the bolt using density.

Two mirrors are inclined at an angle of 45degrees and a point object is placed between the two mirrors.the number of images formed is

The length of a spring is 40cm and its constant is half a newton per centimeter. If we tie a weight of half a kilogram to the end of it and pull it up at a Acceleration of 4m/s², what will be the length of the spring?

A shopper in a supermarket pushes a loaded cart with a horizontal force of 100 N. The cart has a mass of 30 kg. How far will it move in 3.0 s if the shopper places his 30-N child in the cart before he begins to push it? The coefficient of kinetic friction is 0.2

Consider Bob on Earth. At time t = 0, Alice flies by in her spaceship at constant velocity, heading to the right. (This is the same situation as the first question.) Which diagram represents Bob’s world line in Alice’s frame of reference?

A racing car moving along a circular track of radius 'r' at constant speed 'v' has described the angle 'a' at the centre of track. What is the average velocity?

A body is thrown upwards with constant velocity.What will be the distance travelled by body in last second?

In Young's double slit experiment,a light of wavelength Is exposed to the slits which are separated by a distance d.analyze what change in the fringes will take place on the screen.will there any change be observed on the screen if one slit is closed?