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At one time, biologists thought that fungi were merely forms of plants that had lost their chlorophyll and had returned to saprotrophy to gain food. Why is this no longer considered a solid theory?
A) Fungal cell walls contain chitin rather than cellulose.
B) Fungi attack and engulf food for internal digestion.
C) Fungi have flagella at some stage, providing mobility that plants never have.
D) Plants are multicellular and fungi are unicellular or multinucleated noncellular plasmodia.
E) All of these are differences between fungi and plants.
Natural gas composed of 60. mol% methane, 30. mol% ethane, and 10. mol% propane at 25 °C and 500. psia is fed at a rate of 50. m3/hr into a boiler. In the boiler it is blended with enough air to provide 20% excess oxygen and combusted.
200 kJ of heat is added under constant pressure to 1 kg of steam initially at 30 bar, 400 °C. What is the final temperature? What is the change in internal energy during this process?
Calculate the mass of methane that must be burned to provide enough heat to convert 363.0 g of water at 43.0°C into steam at 117.0°C. (Assume that the H2O produced in the combustion reaction is steam rather than liquid water.)
A stream that contains a mixture of methane (25% by mol) and carbon monoxide is compressed from 1 bar, 35 to 12 bar. The compressor efficiency is 90%. Treating the mixture as an ideal gas, calculate the required work.
Compute the power factor for zero voltage regulation on full load.
Determine the reactive kVA of the motor, and the overall power factor of the motor and the load.
If a 500-hp, 90% efficient synchronous motor, operating at full load and 0.8 leading power factor, is added instead of the capacitor in part (a), calculate the resulting power factor.
A value of mass transfer coefficient kg = 0.0150 kg /m2-s . it was also found that the corresponding heat transfer co efficient = hc = 15 j /m2-s
The circuit is to be tuned to the first station at a frequency of 1000 kHz. In order to minimize the interaction between signals, the tuning circuit response must attenuate the signal of the second station (with a frequency of 1020 kHz) by four ti..
What is the minimum value of qo so that the bottom fibers just begin to yield? What are the depths of plastic penetration d1 and d2 for a load qo that is 1.1 times the value just calculated.
Show the implementation of the same synchronous counter using D flip-flops.
A 95 turn square wire coil of area 0.040 m2 rotates about a vertical axis at 1730 rpm, as indicated in Figure P20.30. The horizontal component of the Earth's magnetic field at the location of the loop is 2.0 10-5 T.
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