a lightning rod of iron of diameter 0.8 cm and length 0.5m is struck by lightning and carries a current of 1 x 10^4 A. What is the potential drop?
Bullying, never ends does it? I know sometimes telling parents is hard because they will start calling you names or what ever. You could try beating them up of giving them wedgies also, its 2 vs 2 right? But you could also try talking. When they're doing it tell them they look immature and stupid doing that to an 8 year old kid. That they should grow up and find something productive to do rather than looking like fools. Stuff like that. Maybe you can find some better phrases, Hope it helps and that you can solve the problem. Good luck!
If they're standard pipe sizes and the join is purely functional then why not a standard compression fitting from a plumbing hardware store? If you want it to look better then you could insert one pipe inside the other and glue the overlap together- an expoxy should bond to both or silicone sealant for a more flexible bond If you have workshop tools, you could try threading the ends and bolting them together with o-rings to seal What is the fluid to be carried, how permanent a join and what environment will it operate in all need to be defined to give a better answer really!
