We are sorry that we have caused you so much trouble by sending only half the agreed number of motors for this month. At your request we are submitting a semiannual progress report for the Petrochemical Department. Since there have been extensive job restructing and maintenance preparation for the new 5th Shift, a report on the status of the department, though routine, is especially important now. Electrical current is really the movement of electrons through a conductor. This movement causes heat.
Electrons move easily through some materials, and cause very little heat.
Such materials are called good conductors. However, when electrons pass through a poor conductor they meet more resistance. The more resistance the electrons meet, the more heat they will build up. Use another door. The machine did not have any defective parts.