Gravity keeps the moon where it's supposed to be — in orbit. Peepo / Getty Images Gravity is a force that we experience every day, yet it remains somewhat of a mystery. It's the reason we stay grounded on Earth and why objects fall when dropped. Although there are several theories ...
Explain gravity. A GFI may trip just because the live/hot and neutral wires connected to it are significantly different in length. Explain why. Explain the close relationship between magnetism and electricity. How can electricity produce magnetism, and magnetism produce electricity?
Scientists think Mars originally formed in the ancient past from an accumulation of spacefaring gas and dust, brought together by gravity. Modern Earth has a magnetic field called a "magnetosphere" that protects us from the worst effects of solar wind. Mars once had a strong magnetosphere of its...
Imagine you place a cannon atop a mountain and fire it horizontally. The cannonball will travel parallel to Earth's surface for a little while but will eventually succumb to gravity and fall to the ground. Now imagine you keep adding gunpowder to the cannon. With the extra explosives, the ...
Once aloft, gravity (the weight of the hang glider and pilot) pulls the glider back toward Earth and propels the glider forward, continually causing air to flow over the wing. In addition to the horizontal movement of air, hang gliders can get lift from rising currents of air, such as ...
Earthquakes may take place anywhere on the earths surface. During all earth quake, the vibrations make the earths surface tremble, and even crack open. Houses fall, people are lilled or injured and sometimes whole cities are destroyed.
Weight at the Surface of the Earth The gravitational force at the surface of the Earth is equal to the weight. This force pulls us down to the surface of the Earth whose magnitude is the product of the mass of the objectmand acceleration due to gravity...
To place a satellite in a stable orbit around Earth, it must overcome Earth’s gravitational pull and air resistance in the lower atmosphere. Theescape velocityfor a satellite is around 7 miles per second. Even after escaping Earth, the pull of gravity contests a satellite’s tendency to rema...
For more information on the physics of flight, read How Airplanes Work. A skydiver exiting an aircraft will instantly experience the pull of gravity -- the force of weight. If he or she is wearing a wingsuit, then the suit's airfoil will provide lift. However, the airfoil isn't large ...
At the core, gravity pulls all of the mass inward and creates an intense pressure. The pressure is high enough to force atoms of hydrogen to come together in nuclear fusion reactions — something we try to emulate here on Earth. Two atoms of hydrogen are combined to create helium-4 and ...