For the physicists and lovers of physics in the house, here are some interesting questions in physics to spice up your weekend.

1-EARTH
Where on the surface of the earth could you travel one mile south,one mile east and one mile north and still end up at the same place ?

One answer is easy to find. But there are other answers. Many of them. Where are they and how
many are there?

2-quantum tunneling
Quantum tunneling-the ability of a particle to surmount a barrier that is classically impossible

it is a law that in this process the particle can attain a speed greater than the speed of light,and won't contradict the special theory of relativity in this process-the question is how?

3- Just rolling along
Figure below--- shows a wheel (grey) with a central hub
(green). It can roll freely on the flat, level table-top. A beam (yellow) is pressed on the bottom of the hub and pulled to the right with force F.The radius of the large wheel is 13, the radius of the hub is 3.
The beam, hub, and wheel all roll without slipping.

4- what will be your result if the beam was placed ontop of the hub