When you deal with massive bodies like the Earth, however, which has a mass of 6 x 1024 kilograms (see How much does planet Earth weigh?), it adds up to a rather powerful gravitational force. That's why you're not floating around in space right now. The force of gravity acting on ...
When your pinwheel helicopter falls, it is due to the force of the earth’s gravity. Lift, and the design of the rotors help it stay in the air. It naturally falls to the ground, which causes the paper to bend slightly upward due to lift. When your paper helicopter falls, air pushe...
Well, does your mass (all the atoms that make you up) go away as well when you “lose your weight” in space? Think: So, If you both still have your mass, do you still have any inertia? Meaning, is it still hard to move you and the anvil? Or did it just become “easy”, ...
The amount of drag is proportional to the airspeed of the hang glider: The faster the glider moves, the more drag it creates (see How Gliders Work for details). How a pilot maneuvers a hang glider As with soarplane gliders, the balance of these three forces (lift, drag, gravity) ...
Find out about the largest rocket to ever be made, as well as the most powerful, and learn how to actually make one yourself (well, not quite a life-sized version). Follow our short video to learn how to make a rocket with household items, and have fun in the process!
man to go where no man has gone before in space. It would be possible to make trips to Jupiter and even beyond the heliopause, the point at which thesun's radiation ends. But it will still be a long time before astronauts are asking their starship's helmsman to take them to warp ...
dehumidifier in extremely moist conditions, however, or if you need to keep your dehumidifier on all the time, you should look into a unit with a built-in condensate pump, which regularly pumps water out of the unit's reservoir rather than simply relying on gravity to empty it as a hose...
[2]. This test should incorporate various drop heights to assess at what height the athlete can elevate more his centre of gravity, and it was already proven to be a reliable and valid test to measure the RSI [3]. The RSI can be calculated by dividing the jump height by the ground ...
Simple, crystal clear directions that make EVERY step of growing your potent marijuana plants so fun and problem-free that even 90 year old grandmothers could grow their own killer herb supply (and they have!) Growing Elite Marijuana is a "stoner-friendly" hands-on walkthrough as well as the...
A.sometimesB.oftenC.alwaysD.seldom 20. A.ifB.orC.butD.so 21. A.playedB.playC.playingD.to play 22. A.manyB.muchC.littleD.few 23. A.knowB.knewC.knowsD.knowing 24. A.heB.himC.hisD.himself 25. A.makesB.makeC.madeD.was made ...