a truck weighs 7280 pounds. If the pressure exerted by its tires on the ground is 87.5 pounds per square centimeter, what is the area of one tire that in contact with the road

Agas mixture with a total pressure of 745 mmhg contains each of the following gases at the indicated partial pressures: co2, 245 mmhg ; ar, 119 mmhg ; and o2, 163 mmhg . the mixture also contains helium gas. part a what is the partial pressure of the helium gas? phe p h e = nothing mmhg request answer part b what mass of helium gas is present in a 10.2-l sample of this mixture at 283 k ? m m = nothing g request answer

Express the following number in scientific notation. 0.026890 =

This drawing shows a human body system. what is the primary function of this body system?