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.
What Is Bee Propolis? Propolis is a sticky substance that bees make which is better known as bee glue. The process begins when an expert propolis-making bee gathers resin from cone-producing evergreen trees or from the buds of trees. The bee will gather this sticky sap when the proper weather makes it pliable and soft.