Explain friction of rough surfaces, Friction of rough surfaces Place tw...

Friction of rough surfaces Place two pieces of sandpaper together. Notice the friction that is formed when one is rubbed against the other. Now put some grease among the pieces

Electric, What makes a flashlight suddenly become dim or bright when you sh...

What makes a flashlight suddenly become dim or bright when you shake it?

Describe the parallel force, Q. Describe the parallel force? Answer:- ...

Q. Describe the parallel force? Answer:- Parallel forces are two or else more forces which perform in parallel. The forces don't have to be in the similar direction howeve

Define two dimensional wave , Energy is transmitted in a plane in two mutua...

Energy is transmitted in a plane in two mutually perpendicular directions. Example : Wave propagating on the surface of water.

Motion, An athlete run a certain distance before taking a long jump. Why?

An athlete run a certain distance before taking a long jump. Why?

Obt, Obtain expression for an optical path difference for formation of circ...

Obtain expression for an optical path difference for formation of circular fringe in Michelson''s interferometer

Cooling by radiation, Assume a hot system at temperature T placed in an env...

Assume a hot system at temperature T placed in an environment at a lower temperature T0. The system emits more radiation than it absorbs and cools down whereas the surrounding abso

Michelson interferometer diagram,

Thermal expansion, When a body is heated, it expands in terms of area, leng...

When a body is heated, it expands in terms of area, length & temperature and volume rises. In a solid, molecules may only have thermal agitation. As temperature of a object enhance

An example of measured wavelength by astronomers on earth, A galaxy in the ...

A galaxy in the constellation UrsaMajor is receding from the earth at 15,000 km/s. If one of the characteristic wavelengths of the light the galaxy emits is 550 nm, what is the cor