ESE 123 Chapter Notes - Chapter 1: Atomic Nucleus, Fundamental Interaction, Strong Interaction

• School: Stony Brook University
• Department: Electrical Engineering
• Course: ESE 123
• Professor: David Westerfeld

Document Summary

We all know that physical effort is required to move heavy objects up hill. This physical effort is a form of work or energy. Energy comes in many forms and can be converted between these forms. Energy is converted; it cannot be created or destroyed. The unit for energy is the joule (j). The rate at which energy is converted is called power and is measured in the unites of watts (w). Depending on the situation, we may have large power which can be described as horsepower. A horsepower is equal to 746 watts. (cid:1849)=1 (cid:889)4(cid:888) (cid:1849)=1. Voltage is the amount of energy per unit charge. The unit of voltage is volts, which is equivalent to one joule per coulomb. The unit of current is amp which is equivalent to one coulomb per second.