Let R denote the resistance of a resistor that is selected at random from a population of resistors that are labeled 100 ?. The true population mean resistance is =100 ?, and the population standard deviation is =2 ?. The resistance is measured twice with an ohmmeter. Let denote the measured values. Then , where are the errors in the measurements. Suppose that

src="https://sciemce.com/media/4/b4de54865f105c8f25b.jpg" class="w-image" /> are random with and = 1 ? . Further suppose that are independent.

---

Trades & Technology

Oil-fired systems are generally ignited by a high-voltage transformer producing an arc across two electrodes located near the ____.

a. transformer b. nozzle c. triac d. cell

____ has the poorest heat resistance and electron emission characteristic of all the tungsten electrodes.

A. Lanthanum tungsten B. Pure tungsten C. Zirconium tungsten D. Thoriated tungsten

What should you do to engine coolant after draining if it is to be reused?

A. store in an open container B. mix it with distilled water C. store in a sealed container D. add an SCA charge to it

A device that is used to step up generated voltage to make it suitable for commercial transmission is called a _____.

a. power transformer b. current transformer c. potential transformer d. grounding transformer