Physics, 05.10.2019 06:30 melanie12566
Asubstance has a half-life of 10,000 years and an initial mass of 1,000 grams. how many years will pass before only 250 grams of the substance's parent material is left?
a. 20,000
b.25,000
c. 30,000
d.40,000
Answers: 1
Physics, 22.06.2019 16:30
In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.
Answers: 3
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