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.
The Fastest Shark in the Ocean. The shortfin mako shark is the fastest shark in the ocean. This toothy torpedo can swim at speeds of up to 60 mph has a tail like a tuna fish, its favorite prey.  01:58. Get up close and personal with sharks catching their prey.