Physics, 04.02.2020 15:03, demarcuswiseman
"one step in the manufacture of silicon wafers used in the microelectronics industry is the melt crystallization of silicon into a crystalline silicon ingot. this processis carried out within a special furnace. when the newly solidified ingot is removed from the furnace, it is assumed to have a uniform initial temperature of 1600 k, which is below the crystallization temperature. at this temperature, the thermal conductivity of silicon is 22 w/(m•k), the density is 2300 kg/m3, and the heat capacity is 1000 j/(kg•k). the hot solid silicon ingot is allowed to cool in air maintained at a constant ambient temperature of 30°c. the diameter of the silicon rod is 15 cm. end effects are considered negligible. the convective heat transfer coefficient is 147 w/(m2•k). what temperature will exist 1.5 cm from the surface of the ingot after a cooling time of 583 sec (9.72 min)? " consider the rod as acylinder placed vertically.
Answers: 2
Physics, 22.06.2019 09:30, sdolina5
This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer
Answers: 2
Physics, 22.06.2019 10:00, kaniyawilhite
If a stone with an original velocity of 0 is falling from a ledgeand takes 8 seconds to hoybthe ground whays the final velocity of the stone
Answers: 2
Physics, 22.06.2019 14:00, mariahgriego4126
Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.
Answers: 1
"one step in the manufacture of silicon wafers used in the microelectronics industry is the melt cry...
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