A rigid tank of volume 70 ft3, initially contains air at 14.7 lbf/in.2, 520oR. The tank is connected by a valve to a much larger tank containing air at 90 lbf/in.2, 520oR. The valve is opened and air flows slowly until the smaller tank achieves a pressure of 90 lbf/in.2and a temperature of 630oR. The air can be modeled as an ideal gas, and kinetic and potential energy effects can be neglected. For the contents of the smaller tank as the control volume, determine the heat transfer, in Btu. TABLE A-20E Ideal Gas Specific Heats of Som lemp. Air 40 0.240 0.171 1.401 100 0.240 0.172 1.400 200 0.2410.173 1.397 300 0.2430.1741.394 400 o.245o.1761.389 500 o.248 o.1791.383 600 o.250 o.182 1.377 700 o.254 0.185 1.371 800 0.257 0.188 1.365 900 o.2590.1911.358 1000 o.263 0.1951.353 1500 o.276o.2081.330 2000o.286o.2171.312

Explain to someone who knows nothing about fossils the study of invertebrate paleontology and how it scientists understand the history of the earth. be sure your explanation contains a minimum of two complete sentences.

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Utah's great salt lake has an average salinity seven times higher than that of the oceans. very few multicellular organisms live in this harsh environment. an example is the brine shrimp, which must devote a large portion of its metabolic energy to osmoregulation. these brine shrimp must available hint(s)utah's great salt lake has an average salinity seven times higher than that of the oceans. very few multicellular organisms live in this harsh environment. an example is the brine shrimp, which must devote a large portion of its metabolic energy to osmoregulation. these brine shrimp must pump water back into their cells to counter its loss due to osmosisactively pump water back out of their cells to counter its inflow due to osmosissynthesize membranes that are impermeable to substances that upset osmotic balanceactively pump salt back out of their cells to counter its inflow due to osmosis