Which of the following groups of technical factors will produce the least receptor exposure? a 400 ma, 0.010 second, 94 kv b 500 ma, 0.008 second, 94 kv c 200 ma, 0.040 second, 94 kv d 100 ma, 0.020 second, 80 kv

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

layer 3 is younger than layer 6.

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c is the answer. hope this