Describe the applications of a transistor as an amplifier.

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Ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 18oc and exits at 6.0 bar. the refrigerant undergoes a throttling process. determine the temperature, in oc, and the quality of the refrigerant at the exit of the expansion valve.

Positrons are spontaneously emitted from the nuclei of

In a good thermo flask the main cause of heat loss is