The dimensions of are

The electric and the magnetic field, associated with an e.m. wave, propagating along the +z-axis, can be represented by

The maximum height attained by a projectile when thrown at an angle q with the horizontal is found to be half the horizontal range. Then q =

The moment of inertia of a thin uniform rod of mass M and length L about an axis passing through its midpoint and perpendicular to its length is I₀. Its moment of inertia about an axis passing through one of its ends and perpendicular to its length is

The ratio of the velocity of sound m hydrogen to that in helium at the

same temperature is

Two equal forces (P each) act at a point inclined to each other at an angle of 120°. The magnitude of their resultant is _______.

Two waves are represented by the equations y1 = asin(wt + kx + 0.57)m and y2 = acos(wt + kx)m, wherex is in meter and t in s. The phase difference between them is

With what velocity should an observer approach a stationary sound source so that the apparent frequency of sound should appear double the actual frequency? (v is velocity of sound).

When the angle of incidence is 60° on the surface of a glass slab, it is found that the reflected ray is completely polarised. The velocity of light in glass is

A missile is fired for maximum range with an initial velocity of 20 m/s. If g = 10

m /s₂, the range of the missile is