The half-life for such a substance is the time required to have the amount (in grams ) at time (in seconds ), , decay to half the starting amount . In other words, for krypton-91, after 10 seconds we would have . We can use this information to solve for , then plug in various values of to find the amount of krypton-91 that's left...
But we don't need to! We already know it takes 10 seconds for half of the substance to decay. So if we start with 16 grams, then after 10 seconds, 8 grams will remain.
10s later (after a total of 20 seconds), 4g will remain.
10s later (30s), 2g will remain.
10s later (40s), 1g will remain.
10s later (50s), 1/2 g will remain.
Answer:
First you gotta tell me wht dat is
Step-by-step explanation:then ill answer
Question 4 is d question 3 is c
Answer:
bvghb vbub b
Step-by-step explanation: