Why do you think the chemical reactions lab we did is typically called a "copper plating lab"? a. because the acid solution cleaned the pennies and made the copper look shinier. b. because the acid solution cleaned the paperclips and made them look like pennies c. because the copper from the pennies was removed, and then added to the paperclips. d. because the copper from the paperclips was removed, and then added to the pennies.

atomic = no of protons.

mass number-atomic number = neutron number

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: