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.
The advantages of renting hives to the beekeeper include: 1  The fee, which may be more certain than a honey crop. 2  The possibility of arranging the blueberry pollination job between other honey crops. 3  The possibilities of the bees finding better forage than had they been kept in their permanent location.