In typical rockets the mass ratio is between 10 and 30. Imagine a rocket with a total mass of 1 ton and a mass ratio of 1000: when empty, it would only weight one kg, including its cargo, while when full it would need to contain 999 kg of fuel!
Benefits of Bee Propolis For Skin Apparently, natural bee propolis is considered good for younger, acne prone skin, as well as more mature skin. Itâs now being used as a wrinkle fighter by what seems to be a growing number of women.
Propolis is a resinous substance collected by bees from leaf buds and exudates of trees and conifers. The bees modify the original resin composition to produce the Propolis and use it as a sealing agent and to keep the growth of microbes in the beehive under control.