Galileo Galilei was a scientist who studied objects in space. He firmly believed that the planets revolved around the sun. This was not commonly accepted during his time, though, and Galileo often struggled to convince others of heliocentrism. Which sentence could be added to the passage and maintain its formal style?

Over time, however, he was proven to be correct.

Those folks who disagreed with him were dead wrong, though, and now everyone knows it.

Can you believe people didn't believe him?

These days, though, everybody knows he was totally right.

i've read it so how can i ?

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: