Living matter has 1.3 10-10 of its carbon in the form of 14C ...

[audie]

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

[BUTTHOL369]

Answer to Question 1

E

Answer to Question 2

A

[audie]

TYSM

[okolip]

Gracias!