A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times. Assume that the potential energy lost each time he lowers the mass is dissipated. How much fat will he use up considering the work done only when the weight is lifted up? Fat supplies 3.8 10 7 J of energy per kg which is converted to mechanical energy with a 20% efficiency rate. Take g = 9.8 ms2 :

Which of the following atoms has the highest first ionization energy ?

Arrange the following electromagnetic radiations per quantum in the order of increasing energy : A : Blue light B : Yel…

If 0  x < 2, then the number of real values of x, which satisfy the equation cos x + cos 2x = cos 3x + cos 4x = 0, is…

Let P be the point on the parabola, y 2 = 8x which is at a minimum distance from the centre C of the circle, x 2 + (y +…

If one of the diameters of the circle, given by the equation, x 2 + y2  4x + 6y  12 = 0, is a chord of a circle S, wh…

If a curve y = f(x) passes through the point (1, 1) and satisfies the differential equation, y(1 + xy) dx = x dy, then…

If the 2nd, 5th and 9th terms of a non-constant A.P. are in G.P., then the common ratio of this G.P. is:

The system of linear equations x + y  z = 0 x  y  z = 0 x + y  z = 0 has a non-trivial solution for:

The sum of all real values of x satisfying the equation 2x2 4xx 5 5() x   = 1 is:

The absolute configuration of is :