A wooden boat plank from a prehistoric site has a carbon-14 activity of 5 counts per minute (cpm). New wood has a carbon-14 activity of 40 cpm. Carbon-14 has a half-
life of 5730 years. What is the age of the wooden boat plank from the prehistoric
9
site?
A/
years

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth