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Chemistry: Post your doubts here!
why cant we measure the enthalpy change of hydration of anhydrous copper sulfate to copper sulphate crystals other than hess's law -
Physics: Post your doubts here!
well frequency is going to be same in both cases as frequency depends on the source now just plug in values in the equation v=fw(let w equal to wavelength) 1500=150w1 w1=10 then 300=150w2 w2=2 hope u get it -
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Chemistry: Post your doubts here!
N triple bond with N is 944 in my data booklet from sy 2014 are u sure that triple bond is 994 not 944??? -
Chemistry: Post your doubts here!
http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level//Chemistry%20%289701%29/9701_w12_qp_11.pdf qno4 please -
Chemistry: Post your doubts here!
correct answer is A tell me why -
Physics: Post your doubts here!
favg is the average force Favg * t = change in momentum Favg * 2 * 10^-3 = mv - mu (v is final velocity u is initial velocity) Favg * 2 * 10^-3 = 0 - 4.5*10^-3 * .12 now calculate for average force -
Chemistry: Post your doubts here!
is this question really in as level?? -
Chemistry: Post your doubts here!
why is ethanoic acid stronger acid than ethanol explain the above statement please use the concepts of as level to explain this -
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Physics: Post your doubts here!
Forget the photoelectric effect for a moment. Think about what is meant by the intensity of the radiation of the target surface. Intensity = power / [target area] Rearranges to: power = intensity * area If you are keeping the intensity constant, and the area of the photo-target is constant... -
Physics: Post your doubts here!
FUNDAMENTAL SECOND HARMONIC AND THIRD HARMONIC ARE WAVELENGTH=2L WAVELENGTH=L WAVELEGNTH 2/3L RESPECTIVELY NOW PLUG IN IN L AND U WILL GET UR ANS WHICH IS E -
Physics: Post your doubts here!
look buddy this question need some focus the wall is rough but the floor is not because of contact of ladder with both wall and floor there would be component of force perpendicular to the wall and the floor. now since there is the floor has no friction so there would be no horizantal component... -
Physics: Post your doubts here!
as we know that frequency of fundamental is f frequency of second harmonic is 3f and that of third harmonic is 5f u have to memorize it page no 237 chemistry coursebook cie -
Physics Topic Wise Questions (MCQ Answers Included)
buddy can u please upload physics as level pdfs past papers please -
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Physics: Post your doubts here!
u didnt gave correct answer please do tell me if i gaved the correct answer -
Physics: Post your doubts here!
let energy before rebounding E1 and energy after rebounding E2 energy is proportional to mgh m and g are constant here they arent changed since m and g are constants dividing E2 by E1 we get 0.5mgh/mgh=1/2 kinetic energy=(1/2)mv^2 now lets go kinetic energy part (1/2)m is constant here... -
Physics: Post your doubts here!
thanks thats really encouraging -
Physics: Post your doubts here!
do u agree? with my answer as 625 ??