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The minimum energy of an electron that must have in order to escape from the metal surface is called __________. (Stopping potential, work function, threshold frequency, wavelength)

Asked by Narendra Kumar Sharma 22/02/2015 Last Modified 22/02/2015

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Respected tutors! I asked a question some time ago.My goal of asking question ,even after myself being a tutor, is to get clear with not so intuitive concepts, which i find intriguing. Q.What is the change in kinetic energy(ies) of body(ies) after collision of 2 moving bodies; you can take inelastic or elastic collision. 1- Remains same 2-Decreases 3-increases 4-any other possibilty All answers with 'decrease' options are correct, either elastic or inelastic collision. you can take any example and check. Q.Just think can KE be zero after collision? - this time its a bit more intuitive. Thanks.

it should remains same.. but if friction is taken into consideration then decreases would be the right option.

Pankaj

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The pressure and volume formula of a gas undergoing and an Adiabatic Change is __________. (PV =constant, PrV = constant, (PV)r= constant, PVr = constant)

P*(V^r) = constant

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9. The pulse code modulation PCM is a technique which transforms an analogue telephone circuit into a digital signal, and involves three consecutive processes. a. sampling encoding and justification b. sampling, quantization and encoding c. quantization encoding and justification d. sampling quantization and justification

b. sampling, quantization and encoding

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A letter is chosen at random from the word 'ASSASSINATION'. Find the probability that a letter is (i) a vowel (ii) a consonant.

Probability that it is a vowel is 6/13. Probability that it is a consonant is 7/13.

Kumar Upendra Akshay

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Which book is good for class PUC maths?

Vikram series is good

Suman

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