How such a small species landed five hundred miles offshore in sufficient numbers to reproduce (and, subsequently, evolve) will never be known.
For a reactor in a remote area, where few residents could be exposed, an emergency planning zone of two miles might be sufficient to reach the goal, he said; for a reactor in a more densely settled area, where a leak of the same size could expose more people, that might mean an emergency planning zone of more than 10 miles.
The slope in sea level across the Gulf Stream has been measured by satellite radar altimeter to be one metre over a horizontal distance of 100 km (62 miles), which is sufficient to cause a surface geostrophic current of one metre per second at 43° N. The large-scale circulation of the Gulf Stream system is, however, only one aspect of a far more complex and richer structure of circulation.
The biggest challenge, such as it was, was finding a spot to study on Seven Mile Beach a sufficient distance from the skin-baring revelers at Hedonism II, the famously racy resort nearby.
The Old Bedford River was cut from Earith to Salters Lode, a distance of 21 mile, and provided sufficient drainage that the land could be used for summer grazing.
Another book called A New Oarsman's Guide, published in 1896, suggested that the river could be canoed from Iping to the Arun, a distance of 19 mile, when there was sufficient water.
Regular walking is the commonest PA of older adults, walking at a moderate pace of 3 miles (5 km) /hour expends sufficient energy to qualify as moderate intensity PA [ 4].
For comparison's sake, it is worth keeping in mind that the total forcing that ended the last ice age — a forcing that was eventually sufficient to melt mile-thick ice sheets and raise global sea levels by four hundred feet — is estimated to have been just six and a half watts per square metre.
Unfortunately some may be scared off by the limited driving range, but consumers may be surprised that a 100-mile range is more than sufficient to meet their daily commuting needs.
The key to electric cars is making a battery that has a sufficient driving range (125 miles or more), will last 10 years and isn't too expensive.
