What effect does convection have on evaporation if you leave a petri dish of agar in the fume hood instead of uncovered on the bench (both dry air at 293 K and 1.013 x 105Pa), when you compare mass transfer coefficients (kc fumehood Vs kc_room) and kc_rfumehood). Water evaporates from the exposed area into the still lab air at a rate of 5.73 x 10-6 mole/s (WA_room). In the fume hood, it evaporates into a dry air stream at a rate of 2.29 x 104 mole/s (WA_Fumehood). O No difference O About 2.5 times more O About 10 times more O About 25 times more O About 40 times more

Q: piece of beef steak 7 cm thick will be frozen in the freezer room -35 ° C. This product has a…

A:

Q: A food product with 80% moisture content in a 5 cm diameter can wants to be frozen. The density of…

A: The system is a lumped parameter model as Biot number is <0.1 The lumped parameter model for…

Q: Ileat is transferred by convection from water at 48 "C to a glass plate whose surface is exposed to…

A:

Q: explain the relation between thermal diffusivity and thermal conductivity. And why do we have two…

A: Thermal conductivity is defined as the ability of a material to conduct heat. It is the heat…

Q: -„ Energy Balances, Costs and Insulation - A 100 meter long section of a steam pipe with an outer…

A: The total resistance to heat transfer due to convection is calculated as follows:R = 1h(2πrL)h =…

Q: 4. A double window is constructed by two layers of glass separated by a layer of dry stagnant air…

A:

Q: A wall of a house is made of 0.2 m layer of brick followed by 0.05 m of plaster. Calculate the…

A: Given data: Thickness of layer of brick = 0.2 m Thickness of plaster layer = 0.05 m Thermal…

Q: For the predeposition heat treatment of a semiconducting device, boron atoms are to be diffused into…

A:

Q: Estimate the thermal conductivity of Apple Sauce at 35 ° C. (Air content = 75.0% wet basis). Thermal…

A:

Q: Use the on-line psychrometric chart (link in this module) to help solve this problem. The surface…

A: Given data: Surface temperature of the steel duct = 18 0C Dry bulb temperature of the surrounding…

Q: During annealing copper is heated to 120°C. The copper atoms move around the lattice by diffusion.…

A:

Q: The penetration coefficient of A in B is reported at 26 °C, 0.258 cm2 and at the other temperature…

A: Given: Penetration coefficient D1 = 0.258 cm2/sec at T1 = 26 oC and Penetration coefficient D2 =…

Q: The temperature on one side of a 6-in. thick solid wall is 200°F and the temperature on the other…

A: Given that, Thickness of the solid wall x = 6 in × 1 ft12 in = 0.5 ft Temperature on one side of the…

Q: A solution is made by putting 100 g of NaNO3 into 200 mL of water at 70 degrees C.If the solution…

A: Answer Salt precipitates out is NIL A solution is made by putting 100 g of NaNO3 into 200 mL of…

Q: A piece of beef steak 5 cm thick will be frozen in the freezer room -25 ° C. This product has a…

A: Given: Thickness of the beef steak, a = 5 cm = 0.05 m Freezer room temperature, Ta = -25°C = 248 K…

Q: A 7 cm-thick beef steak is being frozen in a -40°C room. The product has 73% moisture content,…

A: Freezing time using plank's constant is given by; tF={ρF Lf/TF-Ta} {[P' a/h] + [ R' a2/k]}where; ρF…

Q: 2. A piece of beef steak 10 cm thick will be frozen in the freezer room -25 ° C. This product has a…

A: Thickness of the food product,a=10 cm=10100 m=0.1 m  Freezer temperature, Ta =-25°C=(273-25) K=248 K…

Q: A 0.2121g sample of an organic compound was burned in a stream of oxygen, and the CO2 produced was…

A:

Q: Problem 1. A copper slab of thickness 2mm is coated with lead of thickness 1mm on one side. Lead…

A:

Principal Quantities and EOS

A physical quantity represents the physical state of a system. It is expressed as the product of a number and unit. The basic quantities used in science are length, mass, and time. The principal quantities are the quantities that are independent of other quantities.