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.
Origins, Composition, Expert opinions, Combination with medicinal plants and other bee products, and more information on Propolis. Propolis is one of the most powerful natural shields there is. It comes from bees, which use it for sealing cracks, sanitizing, reinforcing and protecting the hive. An excellent natural antibiotic, it can be of great help in preventing infections, and is unparalleled in its protection of the immune system.