SERIOUSLY HELP NOWWW LIKE NOWW I REALLY NEED THIS ANSWERED Which of the following is the best way to measure the age of the Earth?
Examine rocks collected in my backyard.

Analyze maps of all known fossil sites in the United States.

Test the rate of decay of specific elements in rock samples.

Explore leaves embedded in ash from recent volcanic eruptions.

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f