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1. Sketch to scale the longitudinal and transverse displacement waves on a monoatomic one-dimensional lattice at a wavelength of λ-4a. Locate the vibration frequency of these two acoustical modes on the ωq -q diagram such as that given by given Figure.
2. Sketch the phonon spectra of a tertiary compound semiconductor whose primitive unit cell contains three atoms such as GaXAIYAsx?
A typical nuclear power plant converts 0.01 percent of the mass of its fuel into energy through nuclear reactions. Find how much fuel would be needed to power an average city for one day
Two boxes with masses m1 = 4.20 kgand m2 = 11.8 kgare attached by a massless cord passing over a frictionless pulley as shown in the figure below. The incline is frictionless, and θ = 46.0°. What is the magnitude of the acceleration of the boxes?
What happens to the size of the force on the proton if the electron is moved 0.50 m closer to the proton.
An 0.82 kg bucket full of water is being swung by a rope in a vertical circle of diameter 2.31 m. Compute the least speed a bucket must be moving so that the water doesn't fall out.
An astronaut's normal weight it 600 newtons. How much would she weigh while orbiting in a satellite at 12,000 kilometers [two earth radii] above the surface of Earth.
A copper telephone wire has essentially no sag between poles 20.5 meters apart on a winter day while the temperature is -15.5° C. How much longer is the wire on the summer day when the temperature is 27.0° C.
If a metal target is bombarded with electrons which have been subjected to a potential difference of 44 kV, the minimum wavelength of the X-rays produced is about?
A spaceship of mass 2.20×106 is cruising at a speed of 5.40×106 when the antimatter reactor fails, blowing the ship into three pieces. One section, having a mass of 4.90×105 , is blown straight backward with a speed of 2.40×106 . A second piece, with..
A 150? resistor is across a 24.0V battery. Find the energy supplied by the battery in 4min
A 28.0 uF capacitor is charged to 160 uC and then connected across the ends of a 4.60 mH inductor. Find the maximum energy stored in the inductor
A golf ball rolls off a horizontal cliff with an initial speed of 13.0 m/s. How much time does the ball spend in the air
A flat rectangular coil 5.20 cm by 10.5 cm contains 34.0 turns of wire. If the coil is placed in a uniform magnetic field, calculate the maximum torque exerted on the coil
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