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What is the minimum thickness of an oil-slick coating of index of refraction 1.3 on water of index 1.5 which would reflect no red light of wavelength 650 nm? (b) What would be the colour of the light that is reflected off the oil?
A stone with a mass of 0.700 is attached to one end of a string 0.8 long. The string will break if its tension exceeds 65.0 . The stone is whirled in a horizontal circle on a frictionless tabletop; the other end of the string remains fixed.
two tiny metal spheres a and b of mass ma 4.40 g and mb 5.90 g have equal positive charge q 2.50 microc. the spheres
A tennis player standing 12.6 m from the net hits the ball at 2.79° above the horizontal. how fast was the ball moving when it left the racket
A thin steel beam 8.0 m long is suspended from a crane and is undergoing torsional oscillations. Two 80 kg steelworkers leap on to opposite ends of the beam, as shown in Fig. 13.29. If the frequency of torsional oscillations diminishes by 15%, what i..
A scaffold of mass 43 kg and length 7.0 m is supported in a horizontal position by a vertical cable at each end. What is the tension in the cable closer to the painter
Planet-X has a mass of 4.25×1024 kg and a radius of 6050 km. What is the Second Cosmic Speed i.e. the minimum speed required for a satellite in order to break free permanently from the planet
A piece of wood is 0.700{\rm m} long, 0.210{\rm m} wide, and 8.00×10?2{\rm m} thick. What is the mass of this volume of lead
A resistance R carries a current I = (5 A) sin 120 ?t + (10 A) sin 240 ?t. What is the rms voltage across the resistor
q1. the length of an air column that produces a strong resonance in a cylinder is 0.18m what is the frequency of the
question derive the expressions to find the wavelength of a particle of mass m and charge q accelerated through a
question one hundred stones are placed on the ground 3 ft. apart the first being 3 feet from a basket. if the basket
A current of constant density, J0, flows through a very long cylindrical conducting shell with inner radius a and outer radius b. What is the magnetic field in the regions rb
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