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I use a toxic gas/vapour meter. This is calibrated prior to use to the default gas methane. When I am detecting say toluene vapours and the meter reads 100ppm (remember this is calibrated for...
For you epidemiology buffs: A recent practice question puzzled me: If a physician were to design a study to determine if accupuncture can be used to induce labor, would he choose a case control or...
I possess what I presume to be a silver tea set which, along with some very odd hallmarks, has a large numeric 1760 stamped alongside. could anyone throw any light on this.
how a wave breaker is formed? what processes bays and headland? Name three factors that determine the hieght of a wave? explain the differance between spring tides and neep tides? explain why the bay...
Amongst the radioactive elements that were incorporated when the Earth was formed were: uranium 238U with a half-life of 4.5 ? 109 y uranium 235U with a half-life of 7.1 ? 108y thorium 230Th with a...
It is proposed that the DNA of 150 different indviduals will be closely studied to find the difference in their genes to the normal population to see what gives rise to diseases such as cancer,...