Can you do this question?

A. Sandy :- 1 - must

Lucky :- 2- must 3- mustn't

Sandy :- 4 - must 5- don't 6 - have to

Lucky :- 7 - mustn't.

B. 1 - shouldn't

2- should

3- shouldn't

4 - should

5 - shouldn't

6 - should

7 - should

8 - should

C. 1 - My sister must tidy her bedroom now.

2 - You mustn't shout in the class.

3 - My parents must do sport every day.

4 - They mustn't wake the baby.

5 - We mustn't walk on the glass.

6 - He must buy some fruits.

7 - You must go to the hospital if you have a cold.

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: