Reset Button. Most boilers have safety devices built in, so if these are tripped a simple reset may get your whole system working. The reset button is normally on the front of the boiler. Sometimes it's a dial that needs resetting to zero and turned back on.
A typical diffusion constant for a medium-sized molecule in water is about . If we want the smell to travel a quarter mile, or a little less than , we get a speed of. This speed is fantastically slow, and says that it would take ten million years for blood to diffuse out to a shark a quarter mile away.
Shaped like torpedo, a great white shark is able to speed through the water at up to 15 miles per hour. They can breach the surface of the water when they attack their prey from below. Averaging 15 feet in length, great white sharks are the largest predatory fish in the world.