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Ask QuestionPosted by Rishu Kumar 6 years, 8 months ago
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Yogita Ingle 6 years, 8 months ago
- Huygens principle states that each point of a wavefront is the source of secondary wavelets (small waves) which spread in all directions with the speed of the wave.
- The new wavefront is formed by drawing a line tangent to all the wavelets.
For example:-
- If a stone is thrown in the river,waves will be formed surrounding that point.
- These waves look like concentric circles and they are known aswavefronts.
- The wavefronts gradually spread in all the directions.
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Yogita Ingle 6 years, 9 months ago
- An acidic oxide is an oxide which when combined with water gives off an acid.
- A basic oxide is an oxide which when combined with water gives off a base.
- When a substance reacts chemically, both as a base or acid it termed as an amphoteric solution.
- Neutral Oxide is one which neither has an acidic characteristic or a basic one.
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Yogita Ingle 6 years, 10 months ago
- Dipole - Induced Dipole Forces refers to the forces existing between the polar molecules having permanent dipole and molecules lacking permanent dipole.
- The permanent dipole of the polar moleculeinduces dipole on the electrically neutralmolecule by creating a deform in its electronic cloud. This induced dipole moment depends on the dipole moment of the permanent dipole as well as the polarisability of theelectrically neutral molecule.
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Yogita Ingle 6 years, 10 months ago
The rest mass of the stable nucleus of a stable atom is always less than the sum of the masses of constituent nucleons. The difference is called the mass defect Δm (i.e., Δm.c2) is utilised in keeping the nucleons bound together. This energy is known as the binding energy. In order to break the nucleus into its constituent nucleons an amount of energy equal to its binding energy has to be supplied to the nucleus.
Posted by Rajeshwari Khairnar 6 years, 10 months ago
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Yogita Ingle 6 years, 10 months ago
The rest mass of the stable nucleus of a stable atom is always less than the sum of the masses of constituent nucleons. The difference is called the mass defect Δm (i.e., Δm.c2) is utilised in keeping the nucleons bound together. This energy is known as the binding energy.
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Gaurav Seth 6 years, 8 months ago
u=0m/s; t=4sec; g=10m/s;h=?
let us use :h=ut+1/2gt^2
h=(0×4)+1/2×10×4×4
h=10×4×2
h=80
therefore the height of the tower is 80meter.
3Thank You