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A thin film of oil (n = 1.22) is located on smooth, wet pavement. When viewed from a direction perpendicular to the pavement, the film reflects most strongly red light at 640 nm and reflects no light at 427 nm. What is the minimum thickness of the oil film?
The evolution of the universe after the big bang is divided into a radiation dominated universe and a matter dominated universe. Which type of universe do we live in and what does it mean to say radiation or matter dominated the universe?
Consider the transitions 3d -->2p in hydrogen. Calculate the possible energies of emitted photons, taking into account the spin-orbital interaction. How many photon lines are there? Please show formulas and explain clearly
q1. an airplane has a mass of 20000 kg and takes off under the control of a constant net force of 30000 n. what is the
an insulated container is filled with a mix of 400 g of water at 20 C and 60 g of ice at 0 C. assuming negligible heat is exchanged with the container, what is the temperature of the mixture when it reaches thermal equilibrium.
A 106 m long train begins uniform acceleration from rest. The front of the train has a speed of 23 m/s when it passes a railway worker who is standing 230 m from where the front of train started. What will be the speed of last car as it passes the..
A proton and an electron have the same kinetic energy upon entering a region of constant magnetic field
A heart dysfunction that can cause death is ventricular fibrillation. This is an uncoordinated quivering of the heart as opposed to regular beating. what is the average power delivered
An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. what is the mass of this canister
You are given a charged metal sphere mounted to an insulating post. You have two other identical but uncharged spheres on their own similar insulating posts. Explain the procedure to give the two uncharged spheres each a roughly equal but opposite..
A hammer strikes one end of a thick steel rail of a length 8.50 m. A microphone located at the opposite end of the tail detects two pulses of sound, Find the separation in time between the arrivals of the two pulses
One solenoid is centered inside another. The outer one has a length of 48.0cm and contains 6600 coils, What is the mutual inductance of these solenoids
A certain alarm clock ticks four times each second, with each tick representing half a period, What is the torsion constant of the coil spring and What is the moment of inertia of the balance wheel about its shaft
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