Q- An organ pipe is closed at one end and is 1.00 m long. Find the wavelength and frequency of the three lowest resonances which this pipe can produce. (speed of sound in air is 340 m/s)
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. June 2019
Collision
Q- A truck with mass 5000 kg is heading east at 20 m/s. Meanwhile a car with mass 2500 kg is heading north at 30 m/s. The two vehicles collide at an intersection, get stuck together and the wreckage keeps moving to some direction.
(a) Is the collision elastic or inelastic?
(b) Find the speed of th…
Thermodynamics
Q- A well-insulated rigid cylinder is divided in to 2 compartments by a conducting piston that is free to move freely. Initially one side of the piston contains 1 m3 of O2 at 5 bar, 800C and the other side contains 1m3 of N2 at 7 bar, 200C. The piston is released and the system is allowed to come …
Electrostatics: Coulomb's Law
Q- Two equally charged point mass of mass m each are suspended from a point by massless threads of length L. In equilibrium position each thread makes and angle ɵ with vertical.
(a) Find the ratio of magnitudes of horizontal electric force and vertical gravitational force on a the masses.
(b) Wh…
Rotation: Sphere over Sphere
Q- A solid sphere of radius R starts at rest on top of a semicircular track of radius S., as shown in the figure. The sphere rolls without slipping along the track until it falls off the track at point B. Point A is a vertical distance H above the ground; the height of point B is unknown. You may as…
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