So we want to know what will happen to the needle of a compass that is held upright and pointing left in front of the solenoid if the current in the solenoid is reversed. If the current is reversed in the solenoid then the direction of the magnetic field of the solenoid is also reversed. So the needle that was pointing left will now point right after the direction of the current is changed.
Earth DOESN'T have a giant bar magnet inside it; instead, our planet's magnetic field is made by swirling motions of molten iron in Earth's outer core. ... The magnetic poles are near, but not quite in the same places as, the geographic poles. The needle in a compass points towards a magnetic pole
It is moving at a constant velocity at C
The people in the ship will see light travelling toward them at speed of light.
<u>Explanation:</u>
As the spaceship is moving away from the space station with one half speed of light. The light travelling from the space station with velocity c which is also termed as speed of light will be moving relative to the people in spaceship. So the relative velocities can be found as
In this case, u’ is the speed of light seen by the people in spaceship and u is the velocity of light while v is the velocity of moving spaceship.So u =c and v = . Then
Thus, the light travelling towards the people in the ship will view that light with the speed of light itself.
Answer:
7.5 km/hr
Explanation:
All you have to do is divide 15 km by 2 hours and you get 7.5 km/hr.