Which of the following is true of a semiconductor?
A. four electrons in outer shell
B. less than four electrons in outer shell
C. more than four electrons in outer shell
D. four electrons in inner shell
Answer: A
You might also like to view...
The objective of cooling water treatment is to reduce or minimize all of the following except:
a. Scale formation- suspended solids form deposits b. Corrosion- electrochemical reactions with metal surfaces c. Fouling- silt, debris, algae plug exchanger tubes d. Wood decay- fungi e. pH increase or decrease f. water deionization
A ____ mine is used when a passageway is bored into a hill or mountain
A) drift B) shaft C) slope D) none of these
Hansus Enterprises is a start-up small business specializing in software systems for machine-based high-school student tutoring in science and math. Sheryl Hansus, the owner, has spoken with lenders to obtain a loan of $50,000 now (year 0), and the same amount in years 3 and 6. Two different repayment schedules are available. They are:
Schedule A: Pay a uniform amount of $19,500 in years 3 through 12. Schedule B: Pay a uniform amount of $20,000 in years 1 through 6, with “balloon” payments of an additional $20,000 in year 2 and a final amount of $40,000 in year 7. To assist in the decision of which schedule to select, determine the following using a spreadsheet: (a) Total amount repaid for each schedule. Which is smaller? (b) The equivalent annual worth of the loan amounts and of the repayments at i = 5% per year over a 12-year evaluation period. Which schedule has the smaller loss per year? Why is this the case?
When ductwork fittings are fafricated, there is more waste with fittings than straignt duct.
Answer the following statement true (T) or false (F)