Figure 1.27 shows the current through and the voltage across an element. (a) Sketch the power delivered to the element for t >0. (b) Find the total energy absorbed by the element for the period of 0< t < 4s.
 FIGURE 1.png)
 ANSWER.png)
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You need to calculate the cross-virial coefficient (B’12) for a mixture. You know that B’1 = - 0.0003 m3/mol, while B’2 = - 0.0006 m3/mol. What is a good estimate of B’12?
A. 0.00045 m3/mol B. -0.00045 m3/mol C. -0.000424 m3/mol D. 0.000424 m3/mol E. It is not possible to answer this without knowing the composition of the mixture.
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There is no real difference between biodiesel and petroleum diesel except for their energy density
Indicate whether the statement is true or false.
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A brushless motor works by ________
A) Rapidly switching the stator field windings B) Rapidly switching the polarity of the permanent magnet rotor C) Either of these D) Neither of these
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Horses belong to the genus:
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