What if we dug a tunnel through the center of the earth connecting the two ends (like two poles). Suppose we have these condition in our tunnel.
1:There is no heat at all.
2:The tunnel be vacuumed (there is no air resistance in it).
Questions 1:What if we jump through this tunnel what would happen then?
2:Can we reach the other end of the earth?
3:If yes, How long it would take to reach the other end point?
4:Can we survive through the journey (if the above conditions are applied)?
5:If there is air at the center what would be the pressure at center?