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 propolis is a sticky, brown substance sometimes known as bee glue. The honey bees gather tree resin, the main ingredient in propolis, from buds and cracks in the bark. The bees add salivary secretions to the resin by chewing on it and add beeswax to the mix. Propolis has a little pollen in it, too. When analyzed, propolis contains about 50% resin, 30% wax and oils, 10% salivary secretions, 5% pollen, and 5% amino acids, vitamins, and minerals. The honey bee workers use propolis as a construction material, similar to plaster or caulk.