If two circles, each of radius 5 unit, touch each other at (1,2) and equation of their common tangent is 4x + 3y =0 ,then equation of the circle a portion of which lies in the all the quadrants is?

Anonymous User Maths Circle 30 Jan, 2020 117 views

## The slope of the tangent at the point (h,h) on the circle x*x + y*y = a*a is? The slope of the tangent at the point (h,h) on the circle is?

Anonymous User Maths Circle 28 Jan, 2020 184 views

A lift of mass 920 kg has a capacity of 10 persons. If average mass of person is 68 kg. Friction force between lift and lift shaft is 6000 N. The minimum power of motor required to move the lift upward with constant velocity 3 m/s is

Anonymous User Physics 24 Jan, 2020 215 views

An inductor of inductance 10 mH and a resistance of is connected to a battery of 20 V at t = 0. Find the ratio of current in circuit at t = infinity to current at t = 40 sec.

Anonymous User Physics 24 Jan, 2020 154 views

## Find the dimension of  below problem? Find the dimension of Anonymous User Physics 24 Jan, 2020 68 views

A battery of unknown emf connected to a potentiometer has balancing length 560 cm. If a resistor of resistance is connected in parallel with the cell the balancing length change by 60 cm. If the

internal resistance of the cell is , the value of 'n' is

Anonymous User Physics 24 Jan, 2020 121 views

Half life of 90Sr is 6.93 years. In a child body 1 ug of 90Sr dopped in place of calcium, how many years will it take to reduce its concentration by 90% (Assume no involvement of Sr in metabolism).

Anonymous User Chemistry 21 Jan, 2020 221 views

Cl2 on reaction with hot & conc. NaOH gives two chlorine having products X and Y. On treatment with AgNO3, X gives precipitate. Determine average bond order of Cl and O bond in 'Y' ?

Anonymous User Chemistry 21 Jan, 2020 162 views

Focal length of convex lens in air is 16 cm (glass = 1.5). Now the lens is submerged in liquid of refractive index 1.42. Find the ratio of focal length in medium to focal length in air has closest value?

Anonymous User Physics 21 Jan, 2020 90 views

An ideal fluid is flowing in a pipe in streamline flow. Pipe has maximum and minimum diameter of 6.4 cm and 4.8 cm respectively. Find out the ratio of minimum to maximum velocity?

Anonymous User Physics 21 Jan, 2020 107 views

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 202 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 1643 views