a) A student measures a single chocolate cookie and finds that it has an average diameter of 5.24+0.02cm. The cookie is near to a perfect cylinder and has a width of 5.5+0.2mm. Calculate: i. The volume of the cookie (6marks) ii. The density, assuming if the student measures the cookie on a top pan balance to be 10g+1.5%. Give your answer in g/cm' and also in kg/m​

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: