Carbon-14 (4c), which has a half-life of approximately 5,730 years, decays into nitrogen-14 (14N). The following data table shows how the amount of 14C in a certain plant changes over time. How long will the
plant have been dead after 2 half-lives have passed?

Calculate the amount of heat produced when 18000 coulombs of charge is transferred in one hour through a potential difference of 50v

World class speed skaters can skate a 3,000-m course in about 4 minutes.what is their average speed for this course? a. 12.5 m/sb. 1.33 m/sc. 1.25 m/sd. 13.3 m/s

Consider two regions of space containing a static electric field, region a and region b. in region a the equipotential lines are more closely spaced than those in region b. what can be said about the relative strength of the electric field in the two regions? a) the electric field in region a is stronger th