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Amena
Questions (5)
You are flying in an ultra-light aircraft at a speed of 41.4 m/s. An eagle, whose speed is 21.7 m/s, is flying directly toward
2 answers
654 views
A sample starts with 1000 radioactive atoms. How many half-lives have elapsed when 875 atoms have decayed?
I am not sure how to
6 answers
2,442 views
Over a time interval of 1.98 years, the velocity of a planet orbiting a distant star reverses direction, changing from +21.9
1 answer
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Over a time interval of 1.98 years, the velocity of a planet orbiting a distant star reverses direction, changing from +21.9
1 answer
1,166 views
A boy jumps from rest, straight down from the top of a cliff. He falls halfway down to the water below in 0.993 s. How much time
1 answer
881 views
Answers (3)
For b) would the answer be the same number of N atoms of X, because the box is in a perfect vacuum?
I got 0.193 half-lives. Does this answer make sense??
Write in exponential notation x*x*x*x*x*y*z
