Class 11th

A pipe open at both ends produces a note of fundamental frequency V₁. When the pipe is kept with (1/3)^rd of its length in water, it produces a note of frequency V₂.The value of V₁/ V₂ is

A string of linear density 0.4 kg/m is stretched with force of 1000 N. A transverse wave is set up along it. The speed of the wave is

The latent heat of vaporisation of substance is

The bulk modulus of a spherical object is B. If it is subjected to uniform pressure P, the fractional decrease in surface area is

Heat is supplied to an ideal monoatomic gas at constant pressure. The ratio of

Two capillary tube of radii 0.3 cm and 0.4 cm are dipped in the same liquid. The ratio of respective heights through which liquid will rise, is

A mass m attached to a spring oscillates with a time period 4 s. If the mass is increased by 1 kg, then period increases by 1 s. Its initial mass is

The equation y = acos²ωt + asin²ωt is

If the earth suddenly stop rotating, the value of 'g' at the equator would

A particle of mass m is moving in a plane along a circular path of radius r. Its angular momentum about the axis is L. The centripetal force acting on the particle is