As we all know,the earthquake is inevitable,but we can take some methods to reduce it.First,when the earthquake happen we should hide under the furniture which are very solid(坚固的).Second,we should keep calm,and dont worry about it.Third,we should make sure that the door is open so ...
Setting up a lunar time zone is not easy.Gravity affects how quickly or slowly time passes.Since gravity is weaker on the Moon than it is on Earth,after 24 hours,a lunar clock would be 56 microseconds ahead of a clock on Earth.Another point to consider is that a ...
On Earth, gravity gives weight to physical objects and causes the ocean tides. The force of Earth’s gravity is the result of the planets mass and density –5.97237 × 1024kg(1.31668×1025lbs) and 5.514 g/cm3, respectively. This results in Earth having a gravitational strength of 9.8 m/s...
Fortunately, it’s orbiting the planet fast enough that it never hits the ground. By the time you made it to the surface of the Moon, around 400,000 kilometers away, Earth’s gravitational pull would be less ...
How fast does the Earth spin? Earth: Earth is one of eight planets that belong to the Solar System and orbit around a large star that is often called the Sun. Not only is the Earth orbiting around the Sun, but it also revolves about its own axis, or in other words, spins. ...
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) ...
The earth is moving at quite a speed moving at over a thousand miles per hour. If you turn something around your head on a string it goes around in a circle until you let go of the string. Then it flies off in a straight line. ‘Turning off’ gravity would be like letting go of...
Understanding Mars’ gravity and its affect on terrestrial beings is an important first step if we want to send astronauts, explorers, and even settlers there someday. Basically, the effects of long-term exposure to gravity that is just over one-third the Earth normal will be a key aspect ...
Centrifugal force from the Earth’s spin is constantly trying to fling you off the planet, sort of like a kid on the edge of a fast merry-go-round. For now, gravity is stronger and it keeps you grounded. But if Earth were to spin faster, the centrifugal force would get a boost, sa...
In the long run, Earth days will lengthen. For hundreds of millions of years, the moon’s gravity has been exerting a pull on our planet, causing high tides and slowing down our spin. In fact, the difference between proto-Earth’s days and our modern days is stark; when the Earth-...