MythBusters

Seasickness: Kill or Cure - S3-E24

Question: Why does a separated bubble form when you drive with your tailgate up?

Answer: A more complex and complete answer probably isn't possible here, since we're dealing with fluid dynamics, pressure, boundary levels, etc. A simply answer would the air in the bed is kept there by the fast moving air coming off the roof of the cab. If there was no "secondary bubble" of air, you would have a vacuum in the bed. When air comes off the roof, it needs a place to touch down, which it is able to do with the top of the tailgate. The fast flowing air moving over the bed keeps the air that's already inside the bed from "escaping." However, the air in the bed is still moving and creates a vortex in the bed, which is described as a bubble. When the tailgate is down, the air coming off the roof will gather at the back of the cab and create drag.

Bishop73

Seasickness: Kill or Cure - S3-E24

Question: It has already been proven that if you put your finger in a shotgun barrel you will lose your hand. Would you also lose your hand if you put your finger in a pistol barrel?

Answer: The barrel can get hot if it is fired quickly. Revolvers allow hot gasses to escape from the front of the cylinder so you should keep your hand way from the gap. But if the barrel is not too hot and you keep your hand away from anything it should not be near, just touching the barrel will not hurt your hand.

I meant would a blast from a pistol firing blow off your hand as a blast from a shotgun firing?

Join the mailing list

Addresses are not passed on to any third party, and are used solely for direct communication from this site. You can unsubscribe at any time.