
Half-Life Problem Solving Techniques
Interactive Video
•
Physics
•
9th - 10th Grade
•
Practice Problem
•
Hard
Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in solving a half-life problem using a chart?
Ignore the initial amount
Start with the final amount
Begin with zero half-lives and zero time
Calculate the half-life immediately
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If you start with 36 grams and end with 2.25 grams after 72 hours, what should you do next?
Find the half-life directly
Calculate the number of half-lives
Double the initial amount
Ignore the time given
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How much of the substance is left after one half-life if you start with 36 grams?
36 grams
4.5 grams
18 grams
9 grams
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the amount left after three half-lives if you start with 36 grams?
18 grams
9 grams
4.5 grams
2.25 grams
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you calculate the half-life if you know the total time and number of half-lives?
Divide the total time by the number of half-lives
Add the total time to the number of half-lives
Subtract the number of half-lives from the total time
Multiply the total time by the number of half-lives
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the half-life of the material if it takes 72 hours for four half-lives?
24 hours
12 hours
36 hours
18 hours
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of dividing the total time by the number of half-lives?
To ignore the time given
To find the initial amount
To determine the half-life
To calculate the final amount
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