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What is the hardness of water? How is it expressed? Hardness is the property of water which stops lather formation with soap. This is because of the presence of certain salts o
Steel: Steel contains iron with a small percentage of carbon added it. Iron itself is not very strong but the additions of small percentage of carbon in it decrease the ductility
calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 60 km/h?
In Bohr's theory of the atom, what force was responsible for holding the electrons in their orbit? Ans: Coulomb force or the force of attraction among the proton (nucleus) a
Two friends are at the local high school track, a circle measuring 440 yards for one complete lap. Abe can jog at 8.2 miles per hour while Bob’s jogging speed is 4.6 miles per hour
When a metal becomes a superconductor, there is a tremendous decrease in it's: a) Total volume b) Electrical resistance c) Length d) Density Ans: While a
Gravitational field can also be shown by lines of force. This is same in several ways as that of electric lines of forces. With one dissimilarity, electric charges are negative and
Q. Define Fermi energy. Write down the expression for Fermi Dirac distribution law. Deduce an expression for Fermi energy of a system of free particles. Sol. The Fermi Energy
At certain sharply explained wavelengths, the power of X-rays is very large as marked K alpha, K beta .... As shown in figure. These X-rays are called as property of X-rays. At oth
The characteristics of substance by virtue of which it opposes the flow of current by it, is called as the resistance.
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