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What is the thinnest film of oil (index of refraction 1.40) floating on water in which green light (λ= 500 nm in air) is essentially eliminated by destructive interference from a beam of white light incident normally on this film? If the oil film were on glass (n=1.5), what thickness would be required?
At a distance d (d > L) under the point of suspension there is an infinite plane conductor. Find the frequency of the pendulum, for small amplitudes. You can neglect gravity. What criterion determines that that is valid
A tether ball of mass 0.40 kg is attached to a vertical pole by a cord 1.5 m long. Assume the cord attaches to the center of the ball. The cord makes an angle of 20° with the vertical. (a) What is the tension in the cord? . N (b) What is the speed of..
The dielectric to be used in a parallel-plate capacitor has a dielectric constant of 2.40 and a dielectric strength of 1.60 107 V/m. What is the minimum area the plates of the capacitor may have
Initially at rest, a small copper sphere with a mass of 2.77·10^-6 kg, What is the radius of curvature of the sphere's motion in the magnetic field
without moving you will suddenly see the penny magically appear. if you look into the cup at an angle of 70.0 degrees
A 685-kg elevator starts from rest and moves upward for 2.70 s by constant acceleration until it reaches its cruising speed, 1.75 m/s. What is the average power of the elevator motor through this period?
A diving board oscillates with simple harmonic motion of frequency 3.23 cycles per second. What is the maximum amplitude with which the end of the board could vibrate in order that a pebble placed there not lose contact with the board during the o..
A camera with interchangeable lenses is used to photograph a distant object. The angular size of the object is 27 degrees. What is the longest focal length lens
A metal plate of area 0.15 meters squared is on top of a surface. The plate and surface are separated by a 0.3 mm film of lubricant. what is the dynamic viscosity
What is the total translational kinetic energy in a test chamber filled with nitrogen (N2) at 2.22×105 Pa and 20.7°C? The dimensions of the chamber are 1.00 m × 4.30 m × 6.50 m. The ATOMIC weight of nitrogen is 28.0 g/mol, Avogadro's number is 6.022 ..
A charge of uniform volume density 40nc/m3 fills acube with 8.0 cm edges. What is the total electric flux through the surface of this cube?
A typical adult ear has a surface area of about 1.90 10-3 m2. How much power is intercepted by the ear
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