The moon is also in the sky during the day, and without its Earth-facing side illuminated by the sun, observers can't really see it. Occasionally, the moon's orbit does bring it directly between the Earth and the sun during a new moon, causing a solar eclipse or, even more amazingly...
Consider an object bound gravitationally to the earth and resting on its surface. Because of the interaction with the earth, it has gravitational potential energy which is negative. Suppose an external agency supplies the object kinetic energy which is just enough to ...
Fueled by Analog Devices’ semiconductor technology, SolarEdge’s HD-Wave Power Inverter uses advanced precision mixed signal processing to reduce the size, weight and quantity of its internal components—and dramatically cut costs. This is making it possible for solar power to achieve grid parity ...
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making them incredibly dense. This means that their gravitational pull is immense, for example, on the surface of a neutron star gravity is around 1 billion times stronger than its pull on Earth. This makes neutron stars a great test subject to challenge predictions in Einstein's theories, suc...
Gravity is the weakest of the fundamental forces. A bar magnet will electromagnetically pull a paper clip upward, overcoming the gravitational force of the entire Earth on the piece of office equipment. Physicists have calculated that gravity is 10^40 (that’s the number 1 followed by 40 zeros...
What is a dead load? A dead load is a permanent force on a structure, like the weight of the walls. 5 What is meant by force of gravity? The force of gravity is the attraction exerted by Earth on objects, giving them weight. 5 Can load cause deformation? Yes, excessive load can ca...
Earth has a molten iron core that generates heat and produces the protective magnetic fields that protect us from the Sun's harmful rays. As for the Gas Giants, it is believed there is an iron core at the heart of the planet. Due to the extreme pressure in the atmosphere, we have not...
Dark energy is even stranger than we thought, new 3D map of the universe suggests. 'What a time to be alive!' (video) Gamma-ray bursts reveal largest structure in the universe is bigger and closer to Earth than we knew: 'The jury is still out on what it all means.' ...