The Goodyear airship contains 5 400 m³ of helium having a density of 0.179 kg/m³. The solid parts of the airship have a weight of 5.10x10⁴ N. How much extra weight can the airship carry in equilibrium if the density of air is 1.29 kg/m³?

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?