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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
Characteristics of resistance:- Similar amount of current passed by each resistance i.e. I = I1 = I2 = I3 = I4 ........ The sum of potential difference across individual res
1. Brief definitions of the study design, sampling strategy, and outcome variable(s) Study design: cross sectional study is carried out at just one point in time or over a sho
A helium atom is in a galaxy travelling at a speed of 4.89 x 10 6 m/s away from the Earth. An astronomer on Earth observes a frequency from the helium atom of 6.52 x 10 14 H
Two Stage Rocket Suppose the motion of the two-stage rocket or the corresponding velocity-time graph below. The rocket has two successive fuel stages followed through a free-fa
De Broglie wavelength (L. de Broglie; 1924) The prediction which particles also have wave characteristics, where the effective wavelength of an element would be inversely propo
A cylindrical metallic wire is stretched to enhance its length by 5%. Measure the percentage change in its resistance.
Working of Compound Microscope: The object under examination is placed in front of the objective. The objective forms it's real and inverted image with in the focal length of t
In the figure below the closed surfaces A and B appear as closed curves. Find the flux through closed surface B.
A simple model of the earth and moon The earth can be shown by an orange or other round object stuck on a piece of bamboo or a meat skewer. A piece of bent wire or knitting nee
plz derive a equation to magnetic force between short magnetic dipoles at distance apart?
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