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How does black body radiation prove the particle nature of light? Why can't it be explained using the wave nature? ...
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Construct tringle ABC, having given BC = 7; AB - AC = 1; Angle ABC = 45°. Pl. outline the steps. thanks... ...
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From the metals Mg and Fe, select a different metal in each case- a) Does not react with dil hydrochloric acid b) Does not react with cold water but reacts with steam when heated.... This question came in my school chemistry ...
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http://www.chacha.com/question/is-lead-hydroxide-amphoteric claims lead hydroxide to be amphoteric. So, what prevents it from reacting with the base ammonium hydroxide? Thanx in advance... ...
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Work, energy, potential etc. are all scalar, but they can have negative values too. How can scalar be negative? They should neither be positive nor be negative as they are independent of the direction. P.S.: W=FScosΘ; F=vect ...
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If voltage is a scalar quantity, how can it be negative? Thanx in advance... ...
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Blood group A has antigen A and antibody anti B. Blood group O has no antigen. If blood group A is given to a person having blood group O, antibodies (anti A) develop in the person and hence, clumping occurs. But, if O is giv ...
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Difference between which two points gives 230 volts as the p.d.? ...
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PN, PM, and AB are tangents to the circle as shown. If PM = 11 in., then find the perimeter of ΔPAB *Image* ...
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*Image* Thanx in advance... ...
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In a certain base system, a number is written as 3326. Which of the following cannot be the value of the given number in decimal system? (a) 774 (b) 1203 (c) 1758 (d) 2463 Thanx in advance,,, ...
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In my class X physics book it is written that the expression W=QV "is analogous to the amount of work needed in lifting a weight mg from the earth surface to a vertical height h which is given as W=mg x h = mgh. Obviously on ...
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While taking a left turn, a bike bends towrads the left while a car bends towards the right. Why does that happen? ...
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Last ball, India needs 4 runs to win. What is the probability of India winning the game? Answer: 1/3 . I can't understand how to calculate it... Thanx in advance... ...
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Natural display is very popular. It is the display used in most calculators where the graphics is completely natural (generally b/w) and you need external light to see it. It is unlike TV or computer screen pixels where the p ...
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If positron is present in the nucleus of every substance, everything should have had a positive charge. Why is it not so? ...
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When light enters water its amplitude changes. Why? ...
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Please help:- *Image* Thanx... ...
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Please help me with this question: *Image* Thanx in adavance... ...
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*Image* Thanx in advance... ...
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*Image* Thanx in advance... ...
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Chlorine is quite electronegative. So, why is hydrogen bond not present in HCl? Thanx... ...
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If wavelength of light changes inside water due to refraction, why does the colour of light not change? Thanx in advance... ...
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If cos θ + cos2 θ = 1, then sin12 θ + 3 sin10 θ + 3 sin8 θ + sin6 θ + 2 sin4 θ + 2 sin2 θ – 2 = (A) 0 (B) 1 (C) 2 (D) 3 Thanx in advance... ...
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What is the difference between a combustible substance and a supporter of combustion? Thanx in advance... ...
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Pressure at a point= hdg where h is height and d is density.Now look at the figure given below. *Image* Here, the pressure is more at point A than the pressure at point B as height of A is more than that of B. So, fluid shoul ...
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A covalent compound that in aqueous solution conducts electricity ...
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A compound whose aqueous solution will have the highest pH is ...
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Which of the following pairs of substances are both used as refrigerants? ...
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An artery is a vessel that carries blood ...
