Recent content by Mohammad Fajar

So the only way EM field exist at infinity (or at far distance) is when it appear as a wave. There is no other way to detect it (using measurement) at far distance except when it transform into a wave?

But electromagnetic wave can travel up to far distance like how the light from the sun arrive on earth. But for (static) electromagnetic field it is diminish even when not far away from the source. So when I close the circuit and current travel at the wire loop, do you think there is magnetic...

When there is electric charge, then there is an electric field in space aorund it. Or when the electric charge is moving (without acceleration), then it is produced magnetic field in a space around it. Both of these fields permeated to infinity according to Maxwell theory. But how fast...

Not like that. If the Earth rotated, then if we place a perfect ball at the pole it will move away from the pole during course of the day.

can you post your calculation? even if that have a small acceleation it still created a force. Just multiply that with an hour, 3600 second, and you will get that your velocity away from the Earth axis.

He rotated around the Earth axis.

But if the Earth rotating if we place perfect ball in a flat surface, then the acceleration around 0.06 m/s^2 is enough to move that ball away from axis of rotation. If it have initial velocity 0 m/s then during an hour it will have velocity 216 m/s.

Sory, centrifugal force always act outward the axis of rotation.

it is around 0.06 m/s^2. Dont compare that with Earth gravity acceleration.

Not at the equator, but at the pole. The centrifugal force have a projection (component) that parallel to the ground. And this component of force perpendicular to the normal/gravity force. So there is a net force that perpendicular to the gravity force. Say in y-axis there is gravity and normal...

But it is still effected our motion. We will lost our balance. Gravity with acceleration 9.8 m/s^2 will cause a very strong force, like what we experienced when we hanging in the tree. But a small acceleration still make a significant force that can be our experienced.

Gravity perpendicular to the ground. But there is still centrifugal force if we travel at circle path. And in the pole our rotation plane not concentric with gravitation plane.

If we ride a Merry Go Round, even if it have a normal force that balanced our weight, we still experienced centrifugal force.

If we standing in the equator, then centrifugal force caused by Earth rotation directly balanced by gravity force. But what if we standing in the high altitude or in the pole? In the pole at the distance like 40 km from north pole (so the north pole inside the horizon plane), the gravity have no...

It is the distance as measure by ##S## (source).