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.
Propolis has been used as a medicinal agent since ancient times. It was used in folk medicine as early as 300 BC for cosmetic purposes, inflammation, and wound healing. It has been used internally and externally and is believed to kill bacteria, viruses, and fungi, to possess local anesthetic, antiulcer, and anti-inflammatory properties, and to lower blood pressure and stimulate the immune system.