The half-life of cobalt -60 is 5 years if you have 10 grams of co-60 how much do you after 15 years

Which is an example of a population?

How have high taxes on tobacco products impacted the number of people who use them? a. the number of tobacco users has increased. b. the number of tobacco users has decreased. c. the number of tobacco users has not changed. d. the number of adolescent tobacco users decreased, while the number of adult users increased

If 360 joules of work are needed to move and create a distance of 4 m what is the weight of the crate