What is the initial amount of radioactive goo the scientist starts with?

Half-Life and Exponential Decay Concepts

Interactive Video
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Mathematics, Science
•
9th - 12th Grade
•
Hard

Amelia Wright
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
71 grams
200 grams
100 grams
15.2 grams
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
After how many minutes does the sample decay to 15.2 grams?
50 minutes
20 minutes
30 minutes
40 minutes
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which form of the exponential function is used in this example?
Fourth form
First form
Second form
Third form
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the continuous decay rate (K) rounded to six decimal places?
-0.064246
-0.046426
-0.046246
-0.064426
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in solving for the decay rate K?
Add 200 to both sides
Divide both sides by 200
Subtract 200 from both sides
Multiply both sides by 200
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the approximate half-life of the radioactive goo in minutes?
8.5 minutes
11.8 minutes
9.8 minutes
10.8 minutes
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the shortcut formula for determining the half-life using the decay rate?
Natural log of 2/1 divided by K
Natural log of 1 divided by K
Natural log of 2 divided by K
Natural log of 1/2 divided by K
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