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PHY 102 Test Compilation PHY 102 28 Objective Question
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Question

The counting rate from a radioactive source is 8000 counts/s at time t=0, and 10 minutes later the rate is 1000 counts/s. What is the decay constant?
Options
A . lambda=0.208/min.
B 2.08 min-1
C 0.208 min-1
Correct Answer
D 2.80 min-1
Correct Answer

Option C is the correct answer.

Detailed Explanation

N=N0e^(-lambda t). 1000=8000e^(-10lambda). lambda=0.208/min.

Hint

N=N0e^(-lambda t).

Question Info

Course: PHY 102
Topic: Test Compilation PHY 102 28
Type: Objective
Difficulty: Not specified
Question 1619 of 1819
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