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The steel layer with a thickness of 1.5 mm is kept in a nitrogen atmosphere and stable diffusion at 1200 C. The diffusion coefficient of nitrogen at this temperature in steel was 6x10-11 m2 / s and the diffusion flux was 1.2x10-7 kg / m2 .s. The concentration of nitrogen flour on the high pressure surface of the steel layer is 4 kg / m3. What thickness of Nitrogen concentration in the layer becomes 2 kg / m3? Consider linear concentration behavior
A free electron has a kinetic energy of 2.56 KeV. What is the De Broglie wavelength of the electron
What is the magnification of the hair?
A block of mass m = 3.07 kg is attached to a spring (k = 29.3 N/m) by a rope that hangs over a pulley of mass M = 6.14 kg and radius R = 8.81 cm. find the maximum extension of the spring
1. a spring with negligible mass stretches 34.0 cm when a 144 g gram mass is suspended from it. now i suspend a mass
the temperature in an electric oven is 192 degc. the temperature at the outer surface in the kitchen is 35.1 degc. the
A 17 kilogram monkey hangs from a cord suspended from the ceiling of an elevator. Find what was the elevator minimum acceleration
Rolling ball: the first hill is at 3 meter above the valley, second hill is at 7 meter. Find will the ball climb up to the top of the second hill
A 1-megabit computer memory chip contains many 60.0 fF capacitors. Each capacitor has a plate area of 21.0x10-12 m2. Express the plate separation in nanometers
The Cosmic Background Radiation Outer space is filled with a sea of photons, created in the early moments of the universe. What is the peak frequency of this radiation
The inverse-square law says that the intensity that you hear/measure of a sound changes depending on how far away you are from the sound source. More precisely, it is inversely proportional to the square of thedistance from the sound source. That is,..
Estimate the average power of a water wave when it hits the chest of an adult standing in the water at the seashore
At what angle should the axes of two Polaroids be placed so as to reduce the intensity of the incident unpolarized light to 1/15?
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