Consider a pemfc operating at 0.8 a/cm2 and 70∘c. hydrogen gas at 90∘c and 80% relative humidity is provided to the fuel cell at the rate of 8 a. the fuel cell area is 8 cm2 and the drag ratio of water molecules to hydrogen, α, is 0.8. find the water activity of the hydrogen exhaust. assume that p = 1atm and that the hydrogen exhaust exits at the fuel cell temperature, 70∘c.

specific latent heat of fusion, lf, of a substance is defined as the amount of heat required to change a unit mass of the substance from solid to liquid state, without any change in the temperature.

explanation:

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer

snell's law

refractve index = sin incidence / sin refraction

its lower due to the doppler effect.: apex