Physics, 29.07.2019 17:20 bar23cardenine01
One method that is used to grow nanowires (nanotubes with solid cores) is to initially deposit a small droplet of a liquid catalyst onto a flat surface. the surface and catalyst are heated and simultaneously exposed to a higher-temperature, low-pressure gas that contains a mixture of chemical species from which the nanowire is to be formed. the catalytic liquid slowly absorbs the species from the gas through its top surface and converts these to a solid material that is deposited onto the underlying liquid-solid interface, resulting in construction of the nanowire. the liquid catalyst remains suspended at the tip of the nanowire. consider the growth of a 15-nm-diameter silicon carbide nanowire onto a silicon carbide surface. the surface is maintained at a temperature of ts 2400 k, and the particular liquid catalyst that is used must be maintained in the range 2400 k tc 3000 k to perform its function. determine the maximum length of a cover plate evacuated space absorber plate water tw insulation l t q"rad nanowire that may be grown for conditions characterized by h 105 w/m2 k and t 8000 k. assume properties of the nanowire are the same as for bulk silicon carbide.
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Physics, 22.06.2019 12:30, promcafee8788
Awheel of mass 48 kg is lifted to a height of 0.8 m. how much gravitational potential energy is added to the wheel? acceleration due to gravity is g = 9.8 m/s2. a. 30.4 j b. 3.1 j c. 297.9 j d. 11,321 j
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Physics, 22.06.2019 15:30, ayoismeisalex
What is a view of science and psychology that says the value of knowledge depends on its usefulness? a. pragmatism b. psychotherapy c. physiology
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One method that is used to grow nanowires (nanotubes with solid cores) is to initially deposit a sma...
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