Author Question: Living matter has 1.3 10-10 of its carbon in the form of 14C which has a half-life of 5730 y. A ... (Read 149 times)

audie · **on:** Jul 29, 2018

Living matter has 1.3 10-10 of its carbon in the form of 14C which has a half-life of 5730 y. A mammoth bone has a 300-g sample of carbon separated from it, and the sample is found to have an activity of 20 decays per second.

How old is the bone?
A) 15,000 y B) 7600 y C) 11,500 y D) 6400 y E) 10,900 y

Question 2

Glycerin, with a viscosity of 1.50 Ns/ m2, is flowing with an average speed of 1.20 m/s through a tube that has a radius of 5.00 mm and is 25.0 cm long. What is the drop in pressure?

A)

144 kPa

B)

45.8 kPa

C)

72.0 kPa

D)

76.3 kPa

E)

129 kPa