Assuming that the snow is of the "heavy" 10: 1 variety, for which 10 inches of snow will melt to produce 1 inch of water equivalent, determine: (a) the total mass of snow which must be melted per hour (in lbm and in kg). use the volume of water formed and the water density or specific volume (b) the total energy (heat) requirement needed to melt this snow (in btu/h and in kw). the heat of fusion (freezing/melting) for water is approximately 334 kj/kg or 144 btu/lbm. (c) "they say" that the biggest challenge to the snowmelt system is not high rates of snow, but rather very windy conditions. in this case, there is a significant additional rate of heat loss due to convection. assume the following conditions for a very windy day: surface temperature = 32°f, air temperature = 20°f, h = 150 w/m2k what would be the rate of heat loss due to convection for this situation (in btu/h and in kw)? so are "they" correct?

Which one of the following research methods can show cause and effect

While studying chemical reactions and conservation of matter, sarah's class conducted a variety of experiments. sarah and her lab partner found the mass of a wax candle and placed the candle in a flask. the students lit the candle and let it burn to completion. all that was left was wax and charred candle wick. per their teacher's instructions, the students found the mass of the products. their data can be seen in the data table. formulate a hypothesis the students could test to explain why the experiment did not support the law of conservation of matter. a) the students could repeat the experiment using different candles; there might have been a flaw in the candle. b) the experiment should be repeatable. the students should run several trials and then take an average of the after mass in each trial. c) the students should have someone in the class check their measurement skills as they repeat the experiment. they may have made an error using the balance. d) the students should burn the candle in a container that has some type of lid so that any gas that is a product of the reaction can be contained and massed. submit

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.