for the "determine data needs" activity of a project, the optimistic estimated duration is 10 days, the pessimistic estimated duration is 20 days, the most likely time is 15 days. what is the expected duration of completing this activity?

This is a PERT  (Program Evaluation and Review Technique) question and the expected duration of completing this activity can be solved using the formula below.

 Pert Expected Duration Estimate = ║Optimistic Duration + (4 x Most Likely Duration) + Pessimistic Duration║/6.

15 days = Most likely Activity Duration.

10 days = Optimistic Activity Duration

20 days = Pessimistic Activity Duration

Substituting these values, we will have

(10 +(4 X 15) +20)/6. The pert estimate is therefore calculated as 15 days

The expected duration of completing this activity = 15 days.

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:

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