A piece of copper bus bar is 0.75 millimeter by 100 millimeters in cross section. What is the cross-sectional area in square centimeters? Carry the answer to two decimal places.

Fill in the blank(s) with the appropriate word(s).


.75

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A watt-hour meter records ____________________.

Fill in the blank(s) with the appropriate word(s).

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Herbicides that kill weeds before they emerge through the soil are termed ____________________

Fill in the blank(s) with correct word

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A) Find the molar flow rate of the liquid product. B) Find the temperature of the recycled vapor that exits the countercurrent heat exchanger.

A compound’s boiling point at P=0.5 bar is 100 K. The Linde liquefaction process is used to produce this compound in the form of saturated liquid at 100 K. The steady state process is described as follows: • The fresh feed joins a recycle stream. The mixed stream has a flow rate of 200 mol/min. • A series of compressors and heat exchangers converts the stream into a supercritical fluid at P=100 bar and T=160 K. At these conditions, the compound has a molar enthalpy of 3000 J/mol. • The supercritical fluid enters a counter-current heat exchanger that decreases its temperature to 140 K, while maintaining the pressure of 100 bar. • The 200 mol/min of supercritical fluid enters a flash chamber in which the pressure is maintained at 0.5 bar. • The liquid product leaving the chamber is saturated liquid at 100 K and has a molar enthalpy of 0 J/mol. • The vapor leaving the chamber has a molar enthalpy of 2500 J/mol. It is used as the coolant in the counter current heat exchanger, and is then recycled and mixed with the fresh feed. The compound in the vapor phase behaves as an ideal gas with CP*=6R at all pressures equal to or below 1 bar, and it has CP=8R in the supercritical state at P=100 bar.

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Magnetically coupled linear sensors used for fuel level sensing are being discussed. Technician A says a magnet is attached to the float arm and when the magnetic field passes the comb, the fingers are pulled against the resistor card contacting resistors that represent the various levels of fuel. Technician B says different contact sites on the strip produce different resistances that are used to determine the fuel level. Who is correct?

A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

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