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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 of sandpaper. The friction is much decreased because the grease fills up the irregularities on the surface of the sandpaper. Applying grease to the moving parts of a machine acts in a same way
Rutherford’s atomic model failure Rutherford proposed that the electrons circulate around the nucleus. However according to electromagnetic theory, such circulating elect
write principles,construction & working of a moving coil galvanometer
Production of electricity by heat: The Seebeck effect - the thermocouple . When two different metals are brought into contact with one another, it is found that electrons can
When is the combination of cells advantageous and why? (Mar 2009) What do you mean by internal resistance of a cell? Write down the value of internal resistance of an ideal cell
why ballistic missile is unpowered and unguided
Phase (Φ) : The amount which express at any instant, the displacement of the particle and it's direction of motion is known as the phase of the particle. If two elements of the
Explain the acoustic cavitation. Acoustic Cavitation: Usually, cavitation is the phenomenon where largely and small empty cavities are generated into fluids that expand to l
At 400.0 K, germanium has 1.13 x 10 15 free electrons/cm 3 . How many free electrons per Ge atom are there at this temperature? At 400.0 K, silicon has 4.54 x 10 12 free
Kinds of graphs in physics
What is the mass of a two stage launch vehicle capable of putting a 100kg satellite into orbit around Mars, beginning in a parking orbit altitude at Earth of 200 km. Solve this pro
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