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.
At this point, the propolis is unloaded and used to patch up holes in the hive. Bees also use propolis as an antiseptic barrier covering invaders with the sticky substance to prevent hive contamination. Propolis As A Natural Antiseptic. Humans have been using this as an antiseptic since the times of ancient Egypt.