I shot a mouse ball (without the rubber) about 5cm away from my head at 130 psi when I accidentally triggered the blowgun with the base of my floor pump (I was holding the cannon and pump in one hand). Also, one of the elbows popped off when I was pumping and the schrader valve has been blown out of ...

Everything taken from Wikipedia .

Pykrete is a composite material made of approximately 14% sawdust and 86% ice by weight. Pykrete has some interesting properties, notably its relatively slow melting rate (due to low thermal conductivity), and its vastly improved strength and toughness over pure ...

http://www.copper.org/applications/plumbing/techref/cth/images/design-data-ratings-form1.gif

WHERE:

P = allowable pressure, psi
S = maximum allowable stress in tension, psi
tmin = wall thickness (min.), in.
Dmax = outside diameter (max.), in.
C = a constant

For copper tube, because of copper's ...