The average distance to the stars that make up the constellations in the night sky around the sun is about

26 light years away for stars which are a bit closer to the earth and several thousand light years away for distant stars

Explanation:

Due to the large distances of cosmological bodies from each other, these distances are measured in light years.

A light year is the distance light can travel in a year which is approximately equal to 9.46*10^{12}km.

The constellation refers to a cluster of stars which appears at night. viewing from earth,they appear close to each other. their distances apart are however very huge.

The distance of the stars closer in the constellation from the earth is about 26 light years away, which for more distant stars are a couple of thousands of light years away.

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:

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