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Work done in increasing the size of a soap bubble from a radius of 3 cm to 5 cm is nearly (Surface tension of soap solution =0.03 Nm^−1): Work done in increasing the size of a soap bubble from a radius of 3 cm to 5 cm is nearly (Surface tension of soap solution =0.03 [...]

A spherical solid ball of volume V is made of a material of density ρ1​ It is falling through a liquid of density ρ1​(ρ2​ 0). The terminal speed of the ball is : A spherical solid ball of volume V is made of a material of density ρ1​ It is falling through a liquid of [...]

A cylinder of height 20 m is completely filled with water. The velocity of efflux of water (in ms^−1) through a small hole on the side wall of the cylinder near its bottom is: A cylinder of height 20 m is completely filled with water. The velocity of efflux of water (in ms^−1) through a [...]

An object of weight W and density ρ is dipped in a fluid of density ρ1​. Its apparent weight will be An object of weight W and density ρ is dipped in a fluid of density ρ1​. Its apparent weight will be September 12, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , Chapter [...]

A resonance in air column of length 20cm resonates with a tuning fork of frequency 450Hz. Ignoring end correction, the velocity of sound in air will be A resonance in air column of length 20cm resonates with a tuning fork of frequency 450Hz. Ignoring end correction the velocity of sound in air will be September [...]

Standing waves are produced in 10 m long stretched string. If the string vibrates in 5 segments and wave velocity 20 m/s then the frequency is :- Standing waves are produced in 10 m long stretched string. If the string vibrates in 5 segments and wave velocity 20 m/s then the frequency is :- September [...]

A closed organ pipe and an open organ pipe of the same length produce four beats, when sounded together. If the length of the closed organ pipe is increased, then the number of beats will A closed organ pipe and an open organ pipe of the same length produce four beats then the number of [...]

An observer standing by the side of a road hears the siren of an ambulance, which is moving away from him. If the actual frequency of the siren is 2,000 Hz​, then the frequency heard by the observer will be 000 Hz​ An observer standing by the side of a road hears the siren of [...]

The equation of a wave is y = 10 sin (2πt/45 + alpha). if the displacement is 5 centimeter at t = 0 what is the total phase at t = 7.5 second The equation of a wave is y = 10 sin (2πt/45 + alpha). if the displacement is 5 centimeter at t = [...]

If at same temperature and pressure the densities for two diatomic gases are d1​ and d2​ respectively, then the ratio of velocities of sound in these gases will be If at same temperature and pressure the densities for two diatomic gases are d1​ and d2​ respectively then the ratio of velocities of sound in these [...]