QUESTION 25The unit cell of NaCl is 5.6 Á, the Young's modulus, in [100] direction is 5 X 101⁰ N/m². Given theatomic: Na = 23 amu and Cl = 37 amu. The wavelength at which electromagnetic radiation (c = 3 X108 m/s) is strongly reflected by a NaCl is:A. 16.4 X 106 mB. 27.5 X 10-6 mC. 51.8 X 10 mD. 70 X 100 mQUESTION 26In a cubic crystal, atom of mass M₁ lie on one set of planes and atoms of the mass M₂ lie on planesinterleaved between those of the first set. If C is the force constant between nearest neighborsplanes, the frequency of the lattice vibrations for the optical phonon branch with wave vector k = 0 is:A. √2C (++++)B. √√C (11/1₁ + 1 )c. √c (²1/12 + 121 121)D. 0

25. Given, Young's modulus, Y=5×1010N/m2 Lattice constant, r=5.6×10-10m Atomic weight,…

Answered: QUESTION 25 The unit cell of NaCl is…

Similar questions

40. UV light is invisible to the human eye, unless we use special sensors. Given the range of wavelengths of UV light (4 × 10-7 m to about 8 x 10-8 m), calculate the corresponding frequencies.
4. A small, spherical object at the edge of the solar system emits its peak wavelength at 4520 nm. You may assume that the object emits like a blackbody. a. Calculate the temperature of the object.
1a. The Intensity of the radiation incident at the earth from the sun is 1380Wm^-2. If the distance from the Sun to the earth is 1.5x10^11m calculate the total power radiated by the Sun. b. In a solar panel 500g of water flow through the pipes in 1 minute. If the temperature the temperature is raised by 20°C how much solar power was absorbed by the water? c. There are plans to build a lot of wind turbines in the sea. Give two advantages of building turbines in the sea compared to land. d. The power in a length of water wave is 1MW. Calculate the power in the wave if the amplitude doubles.
2² $2(x)] where $1(x) and ø2(x) are The wave function is given by y (x, t) = C[3e¬iwitp1(x) + 4e-iwzt, energy eigenfunctions that are orthonormal, and w1 = 3.0 × 1015 Hz and w2 = 7.5 × 1015 Hz. What are the two energy levels in units of eV? Calculate the average energy of the system in eV.
Large quantities of dust should have been left behind after the creation of the solar system. Larger dust particles, comparable in size to soot and sand grains, are common. They create shooting stars when they collide with the earth's atmosphere. But very small dust particles are conspicuously absent. Astronomers believe that the very small dust particles have been blown out of the solar system by the sun. By comparing the forces on dust particles, determine the diameter of the smallest dust particles that can remain in the solar system over long periods of time. Assume that the dust particles are spherical, black, and have a density of 2000kg/m^3. The sun emits electromagnetic radiation with a power of 3.9×10^26W.
The figure below depicts spectral reflectance measurements for three different materials: a green leaf from a healthy plant, a sheet of shiny blue paper, and the palm of a human hand. The measurements are labeled 1 (black line), 2 (red line), and 3 (blue line). Match the measurements to the most appropriate material type
F 264hz
6. From the next shape sin wave found Vp, Vpp, Vr.m.s Vavg V (V) www w 25 20 15 10 -5 -10 -15 -20 -25