Physics, 16.09.2021 03:00 sweetmochi13
Analysis of a basalt rock sample shows that 25% of its radioactive K-40 remained undecayed. How old is the basalt?
A) 2.6 billion years
4.6 billion years
B) 1.3 billion years
D) 3.9 billion years
Answers: 2
Physics, 22.06.2019 06:00
What will a positive and a negative charge do if they are separated from each other?
Answers: 3
Physics, 22.06.2019 10:30
An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.
Answers: 2
Analysis of a basalt rock sample shows that 25% of its radioactive K-40 remained undecayed. How old...
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