Misc: when a piece of glass cracks, how fast does the crack travel?

Questions

Seals can withstand water pressure of up to _________ pounds per square inch?

Jackrabbits are powerful jumpers. A 20-inch adult can leap ___ feet in a single bound?

Javelinas are very noisy animals among each other and squeal, snort, woof, and click their teeth to?

There are close to ______ known species of frogs, including toads?

The most venomous of all snakes, known as the _____, has enough venom in one bite to kill more than 200,000 mice?