An encapsulated 210Po radioisotope was used as a heat source, in which an implanted thermocouple junction converts heat into electricity with an efficiency of 15% to power a small transmitter for an early space probe. (a) How many curies of 210Po are needed at launch time if the transmitter is to be supplied with 100 W of electricity 1 y after launch? (b) Calculate the number of grams of 210Po needed. (c) If the transmitter shuts off when the electrical power to it falls below 1 W, how long can it be expected to operate after launch?
This question was answered on: Sep 21, 2023
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