A100 gram sample of cerium-143 has a half life of 33 hours. how long will it take until there are only 6.25 grams of cerium-143 left?

Asmall number of finches are removed randomly from the wild and placed in a protected bird area. they are given as much food as they need and have plenty of space. why would natural selection not occur in this population? a. there is no reason for genetic mutation to occur. b. the birds compete for limited resources, c. the population has not reached carrying capacity. d. there is no genetic variation in the finches.

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?

What is responsible for the uneven heating between the poles and the equator on any given day