Cs-124 has a half-life of 30.8 s. (a) If we have 7.8 μg initially, how many Cs nuclei are present?

What is binding energy and separation energy

1-10. need . physics. circular motion. 35 points

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)