When using the Rotate tool, how do you lock the protractor to a specific orientation? What other tool allows you to lock the orientation on an object before you begin to create it?
What will be an ideal response?
Move the cursor so that the protractor is oriented correctly, then press and hold the Shift key while placing the protractor where you want it. The Circle tool works the same way.
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You set the pure component molar enthalpies of pure n-propanol and pure n-butanol equal to zero at T = 325 K, P = 0.1 MPa. What can you say about the molar enthalpy of an equimolar mixture at 325 K and 0.1 MPa?
A. Nothing. You cannot fix the reference molar enthalpy for both substances to zero at the same temperature and pressure. B. The molar enthalpy of the mixture is probably close to zero since the mixture is a good candidate to behave as an ideal solution. C. You need to know the heat capacity of the pure components to make a reasonable estimation of the molar enthalpy of the mixture. D. Since the heat of vaporization of both substances is near 42 kJ/mol, the solution enthalpy should be around 42 kJ/mol for an equimolar mixture. E. You must account for the increased number of available microstates to make an accurate estimation of the molar enthalpy.
A system that monitors the outdoor temperature to control some aspect of system operation is
A) an open loop control system B) a closed loop control system C) an ambient loop control system D) an integrated loop control system
All of the following statements are true of bulk density EXCEPT that it ____
a. includes pore space b. does not include pore space c. is measured using oven-dry soil d. is used as an indicator of soil quality
____ indicates that the switch contains only one movable contact.
a. Make-before-break b. Single throw c. Break-before-make d. Single pole