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Re: [Phys-l] Bad physics in National park



The temperature is what the thermometer displays.

If it's "in the shade" then it's likely the surrounding air temp -- depends on the mounting. If it's "in the sun", then it's not likely the adjacent air temperature, but much higher. Assuming no wind, what it reads in the shade will closely be ones perception while shaded, etc.

bc logical positivist.

p.s. the warning should be observed.

On 2009, May 23, , at 09:57, Jacques Rutschmann wrote:

Grand Canyon National Park rangers are concerned about heat exhaustion:
At the bottom of the Grand Canyon, near Phantom Ranch, there is (was?) a
thermometer on a post with a sign that warns that the temperature is
whatever is indicated, but "yet higher in the sun". It seems that the
rangers are not aware that the temperature is a measurement of the
surrounding air. That air might or might not be in the sun, depending on
time of day and cloud cover. Maybe that's nitpicking, but National Parks
claim to educate the public on science, ecology, history etc...
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