Two parallel beams of electrons are moving in the same direction. Does they repel or attract each other?
Explain the Welding ?
Explain about Electron microscope?
what is gravitational force?
For two objects separated by a distance d, if the mass of one of the objects is doubled, what will happen to the gravitational attraction between them?
A bird sitting on a naked wire carrying current feels quite safe, but when the wire between his feet is cut and joined by a very long loop of wire, the bird dies. Why?
What happens, when a magnet is floated on a big cork in a through of water ?
How spectral lines show discrete energy levels in an atom. : quantum physics
Explain the Use of manometer.
What is amplitude?
How many pounds does one gallon of water weigh?
Explain the steps to the scientific notation?
What is meant by geo- magnetism ?