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.
bee that makes propolis-bee glue in action Photo Credit SumikoPhoto/iStock/Getty Images. Bee propolis, also referred to as bee glue, Russian penicillin and beeswax acid, is similar to resin that forms in the buds of cone-bearing trees. The substance is sticky and greenish-brown in color and has a faint aromatic smell.