A diver thinks that if a typical snorkel tube of 0.13 m length works, then a tube of length 6.2 m should also work. When trying to use such a tube, what is the pressure difference between the external pressure on the diver's chest and the air pressure in the lungs of the ...
January 19, 2013
If a vector that is 1cm long represents a velocity of 10km/h, what velocity does a vector 2cm long drawn to the same scale represent? An airplane has an airspeed of 100km/h north. If there is a 30 km/h tailwind, what is its groundspeed?
November 9, 2011
Kim starts to walk 3 mi to school at 7:30 A.M. with a temperature of 0°F. Her brother Bryan starts at 7:50 A.M. on his bicycle, traveling 10 mph faster than Kim. If they get to school at the same time, then how fast is each one traveling? I have tried to answer this word ...
September 10, 2010
2x^2-2x-1=0 How do I use the quadratic formula to solve this because I am totally new at this and need help? Please show me the steps for this equation,so I will be able to do it own my own. Thank you.
September 5, 2010
Two mercury-glass thermometer are labelled T and D respectively.On T scale, at 1 atmosphere, ice melts at -10T and pure water boils at 80T. On the D scale ice melts at 20D and pure water boils at 100D at 1 atmospheric pressure. (a) Derive an equation relating the two ...
August 10, 2010
two mercury-glass thermometer are labelled T and D, respectively. On a T scale, at 1 atmosphere, ice melts at -10T,and pure water boils at 80T. On the D scale ice melts at 20T and pure water boils at 100T at 1 atmospheric pressure. (a) Derive an equation relating the two ...
August 9, 2010