Questions 11–16: fill in the blank in each of these sentences by forming the correct plural possessive of the noun in parentheses. 11. we waited several hours for the (man) decision, then went ahead. 12. the door of the (airplane) hangar had to be repaired before they could takeoff. 13. two insurance companies were involved, and both (company) forms had to be completed. 14. the difference in quality between the two (sheep) wool was apparent. 15. the dental technician told me that flossing was for my (tooth) protection. 16. we were present when our (brother-in-law) new restaurant was opened for business.

11. men's

12. airplanes'

13. companies'

14. sheep's

15. teeth's

16. brothers-in-law's

Explanation:

Irregular plural nouns like men, sheep and teeth take 's possessive case. However, it is unnecessary to add 's to regular plural nouns that end in -s; so nouns like airplanes and companies can just take the apostrophe ' form when forming plural possessive case.

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation: