Tell how many roots of the following polynomial are in the right half-plane, in the left half-plane, and on the jω-axis: P(s) = S 5 + 6S 3 + 5 S 2 + 8S + 20

Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?