Choose the statement that is a misconception about a system in chemical equilibrium.

Select one:
a. The rate of the forward reaction is equal to the rate of the backward reaction.
b. The concentrations of the products and reactants don't change.
c. The values of the products and reactants do not have to match each other.
d. The reactions stop once equilibrium is reached.

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:

in this image, you can see solar radiation going through ocean water.

no image, but probably absorption

close lines strong magnet less close weaker