UNITS m = meters  hz = hertz = how many complete cycles a wave completes per second. Nanometer = 1 billionth of a meter or  1.0x10^-9m VARIABLES C = the speed of light approx. 300,000,000 m/s (300,000 km/s) or 186,000 miles/second.  Yeah thats pretty darn fast. F = frequency  Lower case Lambda = wavelength, the Greek letter that I … Read more

Incorrect.  First of all everything is food for something else.  If that organism on the bottom of the chain were to die off, it could cause the other organism that rely on it for survival to either die as well, or be forced to alternative means of survival, which for a lot of organism is not possible. … Read more

Language, you can't always effectively communicate if you don't understand each other spoken, or written language (including dialects), social status (a wealthy person may not want to associate with less wealthy people out of egotism).  Hope this helps. Any other questions or clarifications needed, then refer to my profile for contact info

I'm not sure you're entirely accurate darkly.  I believe the reason his skin is burning while sweating is due to an excess of those electrolyte minerals which can cause skin irritation in high enough concentrations.  I would suggest to just drink water to help balance those levels out.  Now again I'm not 100% positive so I would ask … Read more

Pilots must wear oxygen mask when flying at high altitudes because of the lack of oxygen.  Approx. 71% of the atmosphere is nitrogen and 21% oxygen.  The other 8% doesnt really matter in this case.  If you look on the Periodic table of elements Row 2 column VI and VII, oxygen  O2 is slightly more massive than nitrogen  N2 and … Read more

Specific gravity for mercury is 13.6 g/mL.  Take the specific gravity and multiply by the volume. In this case our units for specific gravity are in metric (and will be 99% of the time) so we will convert gallons (english system) to the metric system.  3.785 liters are in 1 gallon and 1000 milliliters (mL) are in … Read more