In: Other Topics
Report from laboratory experiments conducted on
11/02/11 as part of PHSC0152 Sec. 02
You will familiarize Yourself with several different kinds of
magnets. They will observe the forces of attraction and repulsion between the
different poles. I will introduce and we will experiment with the forces of
Magnets, batteries, compasses, suspended magnet, permanent magnet, iron filings, electromagnet, nails, straight wire.
Everything in the universe is made of atoms—they are the building blocks of the universe. Atoms are so small that millions of them would fit on the head of a pin. Atoms are made of even smaller particles.
The center of an atom is called the nucleus. It is made of particles called protons and neutrons. The protons and neutrons are very small, but electrons are much, much smaller. Electrons spin around the nucleus in shells a great distance from the nucleus. If the nucleus were the size of a tennis ball, the atom would be the size of the Empire State Building. Atoms are mostly empty space. If you could see an atom,
it would look a little like a tiny center of balls surrounded by giant invisible bubbles (or shells). The electrons would be on the surface of the bubbles, constantly spinning and moving to stay as far away
from each other as possible. Electrons are held in their shells by an electrical force. The protons and electrons of an atom are attracted to each other. They both carry an electrical charge. An electrical
charge is a force within the particle. Protons have a positive charge (+) and electrons have a negative charge (-).The positive charge of the protons is equal to the negative charge of the electrons. Opposite charges attract each other. When an atom is in balance, it has an equal number of protons and electrons.
The neutrons carry no charge and their number can vary. In most materials,...