The current i(t) through a 20-mH inductor is equal, in magnitude, to the voltage across it for all values of time. If i(0) = 2 A, find i(t).
What will be an ideal response?
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When leaving a vehicle unattended a driver should
a. Always set the parking brake. b. Only set the parking brake if the vehicle is parked on a slope. c. Deflate the tires by 10 percent.
The molarity of a solute in solution is defined to be the number of moles of solute per liter of solution (1 mole=6.02 ×
molecules). If X is the molarity of a solution of magnesium chloride 
, and Y is the molarity of a solution of ferric chloride 
, the molarity of chloride ion (Cl-) in a solution made of equal parts of the solutions of 
is given by M=X+1.5Y. Assume that X has mean 0.125 and standard deviation 0.05, and that Y has mean 0.350 and standard deviation 0.10.
a. Find 
.
b. Assuming X and Y to be independent, find 
A window frame manufacturer is searching for ways to improve revenue from its triple-insulated sliding windows, sold primarily in the far northern areas of the United States. Alternative A is an increase in TV and radio marketing. A total of $300,000 spent now is expected to increase revenue by $60,000 per year. Alternative B requires the same investment for enhancements to the in-plant manufacturing process that will improve the temperature retention properties of the seals around each glass pane. New revenues start slowly for this alternative at an estimated $10,000 the first year, with growth of $15,000 per year as the improved product gains reputation among builders. The MARR is 8% per year and the maximum projection period is 10 years for either alternative. Use (a) payback
analysis, and (b) present worth analysis (for 10 years) to select the more economical alternative. State the reason(s) for any difference in the alternative chosen between the two analyses. (c) Find the payback and present worth values using a spreadsheet. What will be an ideal response?
The splines of the drive shaft yoke should be lubricated to prevent ________
A) Rust B) Transmission fluid leaking from the extension housing C) Spline bind D) A vibration