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Q. What are uses of ultra-violet radiations?
Uses of ultra-violet radiations:
(i) They are utilized to destroy the bacteria and for sterilizing surgical instruments.
(ii) These radiations are utilized in detection of forged documents, finger prints in forensic laboratories.
(iii) They are utilized to preserve the food items.
(iv) They assist to find the structure of atoms.
Define the Newton's Law of Cooling Newton's Law of Cooling: A cup of hot chocolate has cooled from 92°C to 50°C after 12 min in a room at 22°C. a) What is the value for k (
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How is radiation emitted from the body? The body radiates energy by thermal conduction by the skin to the air, clothes, etc, around the body. A small amount of energy would als
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Question: For a plane mirror that is true of the normal? Feedback: The usual is an imaginary line that passes through the point of incidence and is perpendicular to
Coulumb's Law: Statement: The magnitude of the electrostatic force among two point's charges is directly proportional to the product of the magnitude of the charges and inve
working principle of alpha,beta and gamma scintillation counter
Linear circuit :- It can be described as one, whose parameters are constant i.e. they do not change with voltage or current.
The weighted rod floats with 6 cm of its length under water [density 1000 kg/m3]. What length is under the surface when the rod floats in brine [density 1200 kg/m3].
If 10 joules of energy are required to move 5 coulombs of charge between two points, the potential difference between the two points is equal to how many volts? Ans: If 10 j
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