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 Product Science, www.bee-hexagon.net April 2015 7 Generally biologically activity decreases with increasing storage. However it was found that propolis solution in ethanol stored for 10-15 years results not in result in a decrease, but in an increase of antibacterial activity 184.