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(a) What wavelength of electromagnetic waves is needed so that the first strong interference maximum in the Bragg reflection occurs when the waves strike the planes at an angle of 15.0o, and in what part of the electromagnetic spectrum do these waves lie?
(b) At what other angles will strong interference maxima occur?
Lillian (mass 32.0 kg) standing on slippery ice catches her leaping dog (mass 15 kg) moving horizontally at 2.0 m/s. Evaluate what is the speed of Lillian and her dog after the catch?
A hydrogen atom has an angular momentum of 1.055x10^-34 kg.m^2/s. According to the Bohr model, what is the energy (eV) associated with this state
A 1.78 m long air column is open at both ends. The frequency of a certain harmonic is 828 Hz, and the frequency of the next-higher harmonic is 920 Hz. find out the speed of sound in the air column.
Two small insulating spheres with radius 4.00×10-2 are separated by a large center-to-center distance of 0.595. One sphere is negatively charged, with net charge -2.40, and the other sphere is positively charged, with net charge 3.70. The charge i..
The pressure and volume of this gas are kept constant, while the number of molecules is doubled. Illustrate what is the final translational rms speed of the molecules?
A loudspeaker of mass 25 is suspended a distance of = 1.60 below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of = 3.30.
Larger animals use proportionately less energy than smalleranimals; that is, What resting power does this correspond to
Lily is sprinting in a 100 m dash. at he 80 m mark her velocity is 9.5 m/s. What is the velocity of the air relative to Lily
A freezer has a coefficient of performance of 6.30. The freezer is advertised as using 430 kW-h/y, On average, how much energy does the freezer use in a single day
A uniform solid disk of mass m = 3.05 kg and radius r = 0.200 m rotates about a fixed axis perpendicular to its face with angular frequency 5.97 rad/s. Calculate the magnitude of the angular momentum of the disk
An opera singer in a convertible sings a note at 419 Hz as cruising down the highway at 81.0 km/hr. What is the frequency (in Hz) heard by a person standing beside road in front of the car? suppose that the speed of sound is 343 m/s.
A 116 g insulated aluminum cup at 15°C is filled with 140 g of water at 50°C. After a few minutes, equilibrium is reached. Estimate the total change in entropy
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