ultra sensitive microphone or technique for listening to inner ear
A friend has very loud tinnitus. He says it is constantly louder than anything else he can hear.
Nothing can be heard by an independant observer such as myself, but it is possible that a sound with a small power level is so...
Is there any software that will convert a series of numbers into a simple line graph, the same as Excel, but allowing me to use a lot more numbers?
I'm writing a program in c to convert a sinewave, or any wave, into a triangular wave.
I've sort of done it, but there is noise in my...
This is not a puzzle question exactly. It's a question about logic that the puzzle illustrates.
There are four dragons. It is known that dragons can have brown eyes but our four all have green eyes. They can see each others eyes, but don't know their own eye colour. They will turn into...
I get the impression that all life on earth, including extinct life, goes back to the same single common source.
Is this the general view? Or could life have started out independantly at different times and/or places. If so is there any evidence?
Effect of doubling CO2 - why logarithmic and not linear?
How does a 30% to 50% increase in CO2 predict a 2-5 deg C temperature rise?
Is there a formula?
Why is the effect on low altitude atmosphere temperature effect of increasing CO2 logarithmic?
I would have thought it would be linear...
atmosphere temperature gradients at altitudes impossible??
Here's a link to a graph:
I don't understand how this is possible.
The atmosphere is
Warm at the surface, (due mainly to infrared heat from earths' surface -ok)
Does a hydrogen baloon ascend faster than a helium baloon?
Ignoring the weight of the baloon fabric, and ignoring friction, but not ignoring the mass of the air, would a hydrogen baloon ascend twice as fast?
Would the same logic apply to lead and aluminium weights falling through water...
Without an atmosphere, the earth's average surface temperature would be -18 C.
The moon's surface temperature averages -23 C. Is this 5 degree C difference due to heat from the earth's core?
(I'm not a student; I'm curious about the climate debate, and trying to figure some things...
How would I calculate the temperature of a theoretical heat-emitting
body wrapped in insulation? If the temperature difference accross
the insulation layer is D, is there a linear relationship between D
and the thickness of insulation; or is it more complicated than that?