Athlete's foot is caused by a microscopic fungus that lives on dead tissue of the hair, toenails, and outer skin layers. There are at least four kinds of fungus that can cause athlete's foot.
Work. In order to accomplish work on an object there must be a force exerted on the object and it must move in the direction of the force. Energy is required to do work and the basic SI unit of energy is the joule, the amount of energy required to exert a force of 1 Newton through a distance of 1 meter (1 joule = 1 newton meter).
Working for the federal government: Part 1. The U.S. government needs a lot of workers to provide its many services. Federal workers carry out key government functions. For example, federal workers ensure food safety, investigate criminal activity, provide emergency care, and develop science and technology. Their work affects millions of people.