The half-life of a radioactive substance is the time it takes to decay by
one-half. The half-l...
Engineering, 06.03.2020 23:39 hstover496
The half-life of a radioactive substance is the time it takes to decay by
one-half. The half-life of carbon 14, which is used for dating previously
living things, is 5500 years. When an organism dies, it stops accumulating
carbon 14. The carbon 14 present at the time of death decays with time.
Let C(t)/C(0) be the fraction of carbon 14 remaining at time t. In
radioactive carbon dating, scientists usually assume that the remaining
fraction decays exponentially according to the following formula:
C(t)C(0)=e−bt
a. Use the half-life of carbon 14 to nd the value of the parameter b, and
plot the function.
b. If 90 percent of the original carbon 14 remains, estimate how long ago
the organism died.
c. Suppose our estimate of b is off by ±1 percent. How does this error
affect the age estimate?
Answers: 3
Engineering, 04.07.2019 18:10
What difference(s) did you notice using a pneumatic circuit over hydraulic circuit.explain why the pneumatic piston stumbles when it hits an obstacle.
Answers: 2
Engineering, 04.07.2019 18:10
Which from the following instrument is commonly used to detect the high pitch butzing sound in bearings? [clo4] a)-digital ultrasonic meter b)-infrared camera c)-spectroscopic d)-vibrometer
Answers: 2
Engineering, 04.07.2019 18:20
An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid
Answers: 3
Engineering, 04.07.2019 18:20
Modern high speed trains do not have perpendicular expansion gaps where rails are joined end-to-end any more they are mostly welded together but what might happen if there was a spell of particularly hot weather that causes inspection of the tracks?
Answers: 1
Mathematics, 25.01.2021 23:50
Mathematics, 25.01.2021 23:50
Computers and Technology, 25.01.2021 23:50
Chemistry, 25.01.2021 23:50
Mathematics, 25.01.2021 23:50
Biology, 25.01.2021 23:50
Chemistry, 25.01.2021 23:50
History, 25.01.2021 23:50