What is the alpha value for an RTD that has 50 ohms of resistance at freezing, and 69.25 ohms at 100 degrees Celsius? How many calories are required to raise the temperature of 15 grams of water 3 degrees Celsius?  Give a functional application of an RTD. Give a functional application of a thermistor. List the three types of energy radiated from a nonblackbody. How can emitted energy be radiated exclusively from a non-blackbody? What does a thermopile consist of? What type of pyrometer views a lightbulb and target simultaneously in a viewfinder?  Which type of pyrometer is the least susceptible to dust and smoke?