An ancient building was known to have been built 4000 years ago. Approximately what proportion of Carbon-14 atoms are still in the building's wooden framing compared to the number which were present at the time of its construction? (half life of 14C = 5730 years)
a. 0.696
c. 0.500
b. 0.616
d. 0.425
B
You might also like to view...
If a stone is dropped with an initial gravitational potential energy of 100 J but reaches the ground with a kinetic energy of only 75 J, this is a violation of the principle of conservation of energy
A) True B) False
The presently accepted value of the Hubble constant gives an age of
A) 4.5 billion years. B) 8-9 billion years. C) 14 billion years. D) 18 billion years. E) 22 billion years.
An object is moving forward with a constant velocity. Which statement about this object MUST be true?
A) The net force on the object is zero. B) The net force on the object is in the forward direction. C) No forces are acting on the object. D) The acceleration of the object is in the forward direction.
When an ion gains electrons, this is called a(n) _________reaction.
Fill in the blank(s) with the appropriate word(s).