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Atmospheric pressure atop Mt. Everest is 3.30×10^4 N/m^2
(a) What is the partial pressure of oxygen there if it is 20.9% of the air?
(b) What percent oxygen should a mountain climber breathe so that its partial pressure is the same as at sea level, where atmospheric pressure is 1.01×10^5 N/m^2?
(c) One of the most severe problems for those climbing very high mountains is the extreme drying of breathing passages. Why does this drying occur?
A 50 newton horizontal force pushes a 10 kg mass sitting on a horizontal surface. What is the acceleration of the mass
most species of fish have expandable sacs commonly known as swim bladders that enable fish to rise in the water by
Can you see the contradiction? If not, just focus on the question I just asked, What is the point of telling a lie?
Find out (a) the coefficient of kinetic friction between m2 and the incline, (b) the acceleration of each mass, and (C) the tension in the string.
The tune of a string instrument will change if it is heated or cooled because the different materials expand or shrink in different ways, resulting in changes in tensions. Calculate by how much each will shrink
A cork on the surface of a pond bobs up and down two times per second on ripples having a wavelength of 7.90 cm. how long does it take a ripple passing the cork to reach the shore
A thin spherical copper shell of radius 9.5 cm carries an excess charge of -4.2 nC. How many excess electrons are on the outer surface of the shell
A 5.95kg object is thrown 17.10m/s at a 30 degree angle andcollides head on at its peak with a 14.5kg object fired at 27degrees which Is also at its peak. At what velocity was the 14.5kg object fired
A 60 μm strand of DNA is strretched by an optical trapfrom equilibrium untill its ends are seperated by an additional 25μm. What is the work done by the trap on the DNA strand
A 4.00-kg model rocket is launched, expelling 54.9 g of burned fuel from its exhaust at a speed of 690 m/s. What is the velocity of the rocket after fuel has burned.
if you are in a roller coaster, which is moving with 10m/s, describing a circular arc with the radius of 10m, what is the force pushing you in the chair at the top of the loop
A satellite viewing a surface location under cloud free conditions measures a 12um radiance of 6.2 W m^-2um^-1sr^-1. Compute the brightness temp Tb.
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