Two simple pendulum have lengths l and 25l/16 . At t = 0 they are in same phase. After how many oscillations of smaller pendulum will they be again in phase for first time ?

Anonymous User Physics Oscillation 29 May, 2020 84 views

A 0.1 kg mass is suspended from a wire of negligible mass. The length of the wire is 1 m and its cross- sectional area is 4.9 × 10–7 m2. If the mass is pulled a little in the vertically downward direction and released, it performs simple harmonic motion of angular frequency 140 rad s–1. If the Young's modulus of the material of the wire is n × 109 Nm–2, the value of n is

Anonymous User Physics Oscillation 29 May, 2020 70 views

Difference between the corresponding roots of x2 + ax + b = 0 and x2 + bx + a = 0 is same and a b, then

Anonymous User Maths Quadratic Equation 29 May, 2020 62 views

A particle is thrown upward vertically with initial speed where g is acceleration due to gravity on earth's surface.What is the maximum height attain by the particle?

Anonymous User Physics Laws of Motion and Friction 29 May, 2020 59 views

A Constant force f is applied on a particle of mass 'm' which is initially at rest. As the particle starts moving a resistive force -bv begins to act on it.Speed of the particle at any instant of time 't' is?

Anonymous User Physics Laws of Motion and Friction 28 May, 2020 71 views

Let a, b, c be any real numbers. Suppose that there are real numbers x, y, z not all zero such that x = cy + bz, y = az + cx and z = bx + ay. Then a2 + b2 + c2 + 2abc is equal to

Anonymous User Maths Complex Numbers 27 May, 2020 62 views

Let A be a 2 × 2 matrix with real entries. Let I be the 2 × 2 identity matrix. Denote by tr(A), the sum of diagonal entries of A. Assume that A2 = I.

Statement­1 : If A I and A – I, then det A = –1.

Statement­2 : If A I and A – I, then tr(A) 0.

Anonymous User Maths Complex Numbers 27 May, 2020 57 views

## Let A = . If |A2| = 25 the |a| quuals to Let A = .

If |A2| = 25 the |a| quuals to

Anonymous User Maths Complex Numbers 27 May, 2020 55 views

## If D =  for x  0, y  0 then D is If D = for x 0, y 0 then D is

Anonymous User Maths Complex Numbers 27 May, 2020 55 views

## Let A =  and B = , a, b  N. Then Let A = and B = , a, b N. Then

Anonymous User Maths Complex Numbers 26 May, 2020 56 views

## If a2 + b2 + c2 = – 2 and  then what is f(x) is a polynomial of degree? If a2 + b2 + c2 = – 2 and then what is f(x) is a polynomial of degree?

Anonymous User Maths Complex Numbers 26 May, 2020 58 views

If A = and I = , then which one of the following holds for all n ≥ 1, by the principle of mathematical induction

Anonymous User Maths Complex Numbers 26 May, 2020 62 views

## If a1, a2, a3, ...., an, ... are G.P., then the value of the determinant  is If a1, a2, a3, ...., an, ... are G.P., then the value of the determinant is

Anonymous User Maths Complex Numbers 26 May, 2020 83 views

## Let A =  and 10(B) = .  If B is the inverse of matrix A, then what is the ? Let A = and 10(B) = If B is the inverse of matrix A, then what is the ?

Anonymous User Maths Complex Numbers 26 May, 2020 52 views

## Let A =  ̄ The only correct statement about the matrix A is Let A = ̄

The only correct statement about the matrix A is

Anonymous User Maths Complex Numbers 26 May, 2020 56 views

## If A =  and A2 = , then If A = and A2 = , then

Anonymous User Maths Complex Numbers 26 May, 2020 55 views

A motor boat going down stream over came a raft at a point A, t = 60 min later it turned back and after some time passed the raft at a distance l = 6.0 km from the point A. Find the flow velocity assuming the duty of the engine to be constant?

Anonymous User Physics 26 May, 2020 67 views

A current carrying wire heats a metal rod. The wire provides a constant power (P) to the rod. The metal rod is enclosed in an insulated container. It is observed that the temperature (T) in the metal rod changes with time (t) as Where is a constant with appropiate dimension with is a constant with dimension of temperature .

The heat capacity of the metal is?

Anonymous User Physics 26 May, 2020 81 views

## What is maximum acceleration so that so that two block move together? What is maximum acceleration so that so that two block move together? Anonymous User Physics Laws of Motion and Friction 25 May, 2020 76 views

Two particles of masses m1 and m2 are placed 'd' distance apart. Due to gravitational attraction they move towards each other.What is speed of m1 when their separation reduces to d/2.

Anonymous User Physics Laws of Motion and Friction 24 May, 2020 92 views

## What is the Value of ? What is the Value of ?

Anonymous User Maths Complex Numbers 23 May, 2020 64 views

## If z = x – iy and z1/3 = p + iq, then when will value of ? If z = x – iy and z1/3 = p + iq, then when will value of ?

Anonymous User Maths Complex Numbers 23 May, 2020 68 views

## Let z, w be complex numbers such that z +  = 0 and zw =  Then arg z equals Let z, w be complex numbers such that z + = 0 and zw = Then arg z equals

Anonymous User Maths Complex Numbers 23 May, 2020 63 views

Let z1 and z2 be two roots of the equation z2 + az + b = 0, z being complex further, assume that the origin, z1 and z2 form an equilateral triangle, then what will be a2?

Anonymous User Maths Complex Numbers 23 May, 2020 67 views

If z and w are two non­-zero complex numbers such that |zw| = 1, and Arg(z) – Arg(w) = then zw is equal to

Anonymous User Maths Complex Numbers 23 May, 2020 68 views