What is the half life of Th-231, if a 500.0 g sample decays to 31.25 g in 148 seconds?

Imagine you work as a consultant, and your daily job involves listening to the constructive criticism of others. as part of your job, you must listen to opposing viewpoints to make important decisions. in this activity, you are a consulting dam engineer. you must make a decision about four different dams; should they be repaired, taken down, or left alone? you will listen to contrasting opinions about what should be done with the dams before you make the final decision. as the consulting dam engineer, what do you decide to do with this dam? explain your reasoning. by making your decision, did you support the opinions of the mayor and/or the dam safety official? why or why not? (site 1)

Give me a example of a decomposer. explain what would happen if decomposers were absent from a forest ecosystem

Calculate a pendulums frequency of oscillation (in hz) if the pendulum completes one cycle in 0.5s.