Cascaded Carnot engine is an arrangement in which heat sink of one engine is source for other. If high temperature for one engine is T1, low temperature for other engine is T2 (Assume work done by both engine is same) Calculate lower temperature of first engine.

Anonymous User Physics 21 Jan, 2020 199 views

A swimmer can swim in still water with a speed of 5 m/s. While crossing a river his average speed is 3 m/s. If he cross the river in the shortest possible time, what is the speed of flow of water?

Anonymous User Physics 28 Nov, 2019 1534 views

## Find the height If a man weighs 90 N on the surface of the Earth, then the height above the surface of the earth of radius R, when the height is where the weight is 30N is

A.0.73R

B. R/√3

C.3R

D.√3R

Anonymous User Physics 11 Nov, 2019 120 views

Copper sulphate solution (250 ml) was electrolyzed using a platinum anode and copper cathode. A constant current of 2 mA was passed for 16 minute. It was found that after electrolysis, the absorbance of the solution was reduced to 50% of its original value. Calculate the concentration of copper sulphate ion in the solution to begin with.

Anonymous User Chemistry 10 Nov, 2019 118 views

Consider a parabola and a hyperbola XY = 1. A tangent is drawn to parabola meets the hyperbola in A and B then the locus of midpoint of AB is

Anonymous User Maths 01 Nov, 2019 556 views

A compound is composed of two elements A and B, element A constitute f.c.c. lattice, while B occupy all the tetrahedral voids, in this way another simple cubic is constituted by element B, inside the fcc unit cell of element A. If all the points/particles along any one edge of inner cube of every unit cell, are missing then what is the new empirical formula of the compound?

Anonymous User Chemistry 29 Oct, 2019 940 views

A block of mass 2 kg is attached to one end of a massless rod of length . The rod is fixed to a horizontal plane at the other end such that the block and rod are free to revolve on a horizontal plane. The coefficient of friction between the block and surface is 0.1. Block is made to rotate with uniform speed by applying a constant external force in tangential direction on the block. The work is done by external force when the rod rotates by 90 degree is

Anonymous User Physics 25 Oct, 2019 1037 views