Showing posts with label earth. Show all posts
Showing posts with label earth. Show all posts

Saturday, December 23, 2017

Here is Why We Don’t Feel Earth’s Rotation


According to science, the earth rotates on its own axis and for that matter, it's constantly spinning. By constantly spinning, it means that it neither slows down nor comes to a halt. Its spinning is smooth and constant. Now the earth basically feels solid beneath us. It actually feels like we are motionless since we cannot feel the rotation or any sort of movement signifying that we are also rotating. It’s really strange that we are actually living on a rotating giant sphere.

The truth is that our giant planet actually rotates at a very high speed. According to science, the speed of earth’s rotation at the Equator is approximately 1670 kilometers per hour or 1000 miles per hour. This simply means that you’re traveling at a speed of about 464 meters per second at the Equator and lesser if you’re located near the north/south poles.

Now that’s quite fast, isn’t it? Can you even imagine running at that speed? Of course not!

So the question is, why don’t we ever feel the rotation? Why does it seem like we are completely motionless? Is it that the earth does not rotate fast enough for us to detect the motion? Is there a theory behind this strange phenomenon?

Well, there is an explanation for this.

According to scientists, chances of us feeling our planet rotating are slim to none because you and everything else on it is traveling at the same exact speed. Another reason is that the Earth’s motion is super-smooth. No bumps or halts along the way- because that’s the only way we could actually feel its movement.


Think of being on a train that is traveling at a constant speed and altitude. Even if you unbuckle your seat and move around the train, you cannot feel its movement. The only way to perceive the movement of the train is if you glance outside the window at the trees, mountains, people, or buildings. The reason is that you, everyone on the train, and the train itself are moving at the same speed. You would only feel the movement if the train stops, speeds up, or changes the route.

So Why Does the Earth Spin Constantly?

The simple reason is- there is nothing stopping it or slowing it down. The ride is incredibly smooth and constant. The moon and the other planets rotate on their own axes, the same way our planet does. This means that the solar system is organized in such a way that nothing can interfere with this balance/process.

If for example a powerful external force interferes with this balance, then the planets and everything else would collide, creating a huge disruption. But there is no chance of this happening considering that everything in our solar system has been spinning for billions of years.

Isn’t it strange living in a place that is constantly moving yet we don’t feel a thing? Well, that’s just how mysterious and fascinating our universe is. All we can do is appreciate what it has to offer as we continue marveling at its wonders. So the next time you lie on the ground gazing up the sky waiting to feel the ground beneath you shift, well just know that it will never happen simply because you are moving right along with it!

What Is the Reason behind Earth’s Magnetic Field?


Earth’s magnetic field has been a debate since the 13th century when the philosophers noticed lodestones turning north for the first time. Queen Elizabeth’s physician, William Gilbert brought it in the spotlight stating that the globe is a great magnet. Scientists now think that Earth is an electromagnet. They believe the Earth is a source of a magnetic field which is a large electric current of billions of amperes. It is said to be in the core fluid of the Earth.

This believed magnetic field in the core of the Earth has been questioning the scientist minds since forever. Nobody has ever developed an urge to go for the mythical journey and figure out the real science. No one has ever taken the journey to the center of the Earth and has been able to evaluate the physics behind this.

Shockwave Study

By studying the shockwaves of earthquakes that travel throughout the planet, scientists have been able to lightly describe its structure. In the center of the Earth, there is a hard inner core that is supposed to be two-thirds of the Moon’s size. This core is completely composed up of iron. At 57,000 C hellish, this core iron becomes as hot as the surface of the Sun. When it reaches such a point, the pressure of crushing caused by gravity helps to prevent it from turning into liquid.


Inner Core Behavior

The center core has got a thick layer of 2,000 km of nickel, iron and other quantities of metals. The metal in the inner core is present in the fluid form. The difference in temperature, composition, and pressure of the outer core ignites convection currents and the molten metal becomes cool, the dense matter becomes warm and furthermore, the less dense matter comes above. Coriolis force due to which the Earth is able to spin is also responsible for swirling whirlpools.

The flow of the liquid iron is responsible for generating electric currents that in return produce magnetic fields. The charged metals that pass through these fields make the electric current on their own and continue the cycle. This self-sustaining loop cycle is known as geodynamo.

Overall, the spiraling occurring through the Coriolis force means that there are separate fields created which roughly align in one direction. The combined effect of these fields keeps on adding up and makes up an entirely large magnetic field that engulfs the planet.

The past studies reveal this concept about the Earth’s magnetic field. The history plays an important role in bringing the topic to the table. Even after the variations, the magnetic field has been losing its energy and cannot possibly be more than 10,000 years old. Now, the Earth’s magnetic field is no longer a history.