Asample contains 10 g of a radioactive isotope. how much radioactive isotope will remain in the sample after 1 half-life? a.5.0 b. 2.5 c. 7.5 d.10

Aheat engine that operates on a carnot cycle has an efficiency of 0.420 when its low-temperature reservoir is at 10 ∘c. part aby how many degrees celsius must you increase the temperature of the high-temperature reservoir to increase the efficiency to 0.600 if you continue to use the same low-temperature reservoir?