A hydrocarbon (A) adds one mole of hydrogen in the presence of platinum gives hexane. When (A) was oxidised with KMnO4 it gave a single carboxylic acid, containing three carbon atoms. Give the structure and name of (A)

Anonymous User Chemistry Hydrocarbons 29 Apr, 2020 1 Answer 71 views

896 ml vapour of a hydrocarbon ‘A’ having carbon 87.80% and hydrogen 12.19% weighs 3.28 g at STP. Hydrogenation of ‘A’ gives 2-methyl pentane. Also the hydration of hydrocarbon ‘A’ gives compound ‘B’. Compound ‘B’ gives yellow precipitate with sodium hypoiodite. Find the structure of A and give the reactions involved.

Anonymous User Chemistry Hydrocarbons 29 Apr, 2020 1 Answer 97 views

A particle performs harmonic oscillations along the x axis according to the law x = a cos wt. Assuming the probability P of the particle to fall within an interval from —a to +a to be equal to unity, find how the probability density dP/dx depends on x. Here
dP denotes the probability of the particle falling within an interval from x to x dx. Plot dP/dx as a function of x.

Anonymous User Physics Oscillation 29 Apr, 2020 1 Answer 62 views

At the moment t = 0 a particle starts moving along the x axis so that its velocity projection varies as vs = 35 cos at cm/s, where t is expressed in seconds. Find the distance that this particle covers during t = 2.80 s after the start.

Anonymous User Physics Oscillation 29 Apr, 2020 1 Answer 59 views


At the moment t = 0 a point starts oscillating along the x axis according to the law x = a sin wt. Find:
(a) the mean value of its velocity vector projection (vs);
(b) the modulus of the mean velocity vector 1(v)1 ;
(c) the mean value of the velocity modulus (v) averaged over 3/8

Anonymous User Physics Oscillation 29 Apr, 2020 1 Answer 62 views

A point performs harmonic oscillations along a straight line with a period T = 0.60 s and an amplitude a = 10.0 cm. Find the mean velocity of the point averaged over the time interval during which it travels a distance a/2, starting from
(a) the extreme position;
(b) the equilibrium position.

Anonymous User Physics Oscillation 29 Apr, 2020 1 Answer 55 views


A particle performs harmonic oscillations along the x axis about the equilibrium position x = 0. The oscillation frequency is w = 4.00 /s .At a certain moment of time the particle has a coordinate X0 = 25.0 cm and its velocity is equal to Vx0 = 100 cm/s.Find the coordinate x and the velocity Vx of the particle t = 2.40 s after that moment.

Anonymous User Physics Oscillation 29 Apr, 2020 1 Answer 77 views








A point moves along the x axis according to the law x = a sin^2 (wt— π/4). Find:

(a) the amplitude and period of oscillations; draw the plot x (t);

(b) the velocity projection vx as a function of the coordinate x;draw the plot vx (x).

Anonymous User Physics Oscillation 28 Apr, 2020 1 Answer 69 views

A point oscillates along the x axis according to the law x = a cos (wt — π/4). Draw the approximate plots (a) of displacement x, velocity projection vx, and acceleration projection wx as functions of time t; (b) velocity projection vx and acceleration projection wx as functions of the coordinate x.

Anonymous User Physics Oscillation 28 Apr, 2020 1 Answer 60 views

















In the nuclear fusion reaction,

 given that the repulsive potential energy between the two nuclei is ~ 7.7 × 10-14 J, the temperature at which the gases must be heated to initiate the reaction is nearly

Note: Boltzmann's constant k = 1.38 × 10-23 J/K

Anonymous User Physics Atomic Physics 26 Apr, 2020 1 Answer 55 views









If gE and gM are the accelerations due to gravity on the surfaces of the earth and the moon respectively and if Millikan’s oil drop experiment could be performed on the two surfaces, then what would be the ratio 

Anonymous User Physics Nuclear physics 25 Apr, 2020 1 Answer 55 views