Why is the magnetic field inside a current-carrying pipe equal to zero?

2) if a solid conducting cylinder was quickly inserted in the hole of the current-carrying pipe, it will not produce eddy currents correct? since the magnetic field inside the pipe is zero?

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below.your friend goes first,and you follow after he has dropped a distance of 2.0m.when your friend hits the water,is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

Does anyone have the answers to online physics course plato course physics, semester a v3.0