Wednesday, March 18, 2009

On the Side of the House

My electric meter happens to be on the side of my house above a steep set of stairs. I had seen it all the time and wondered what it was when I was younger, but I forgot it existed in recent years.
When we use electricity, the current is sent through the electric meter. The current first goes through a coil, making the coil become an electromagnet. The electromagnet induces a current in the second coil. The two coils's magnetic field lines enforce each other to make a disc spin. This disc turns the wheels of the five mini-sized counters. The electricity current which ran into the electric meter continues through and goes into the house to power the appliances, like the refrigerater. That is how the electric meter works. It is strange that I have never seen the meter reader come around.
This picture is the first on this blog from a camera. My mom let me use her camera and I was able to figure out how to put the pictures on the computer! yay.

Saturday, March 7, 2009

In My Locker...


In my locker are four magnets! Two of them can connect to make a hippo and the other two can connect to make a cow.

In any case, magnetism made me think of my hippo and cow. The half-hippos and half-cows create a magnetic field and exert a magnetic force allowing them to stick to my locker and each other. In them are magnets with north and south poles. One side of the hippo has the north pole facing outward while the other side has its magnets' south poles facing outward. I figured out that I could stick a north side of the hippo with the south side of a cow to create a hippow. If I try to stick a north side hippo with a north side cow, they repel because the magnetic fields repel each other. In a magnet are domains, which are large groups of atoms whose spins are aligned. A magnet cannot have a north pole without a south pole.

The picture is not accurate on their sizes and looks... I have a half-hippo sticking to the hangers. They are very cool so whoever reads this should come to look at them sometime :)