Which sentence contains a punctuation error?
a.
we used one-half cup of chopped onions in the recipe.
b.
it will be chilly later, so bring your blue-green sweater.
c.
it is a well known fact that the earth revolves around the sun.
d.
about one third of my friends have pet dogs.

i believe that dan is so anxious because he dose not know what awaits him when he gets there. but i dont know to be honest

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:

easy - boys have problems.

i hope this ! (:

i think the answer is c.