The radioactivity due to carbon-14 measured in a piece of a wooden casket from an ancient burial site was found to produce 20 counts per minute from a given sample, whereas the same amount of carbon from a piece of living wood produced 160
counts per minute. The half-life of carbon-14, a beta emitter, is 5730 years. Thus we would estimate the age of the artifact to be about A)
5,700 years.
B)
11,500 years.
C)
14,800 years.
D)
17,200 years.
E)
23,000 years.
D
You might also like to view...
The red shifts of the galaxies imply that the universe is expanding and that we are at the center
Indicate whether the statement is true or false
Which of the following is true of the orbits of all the planets in our solar system?
a. They all orbit at the same speed. b. They are all made out of gas. c. They all orbit the Sun in the same direction. d. They have many different orbital inclinations.
If an x-ray beam of wavelength 1.4 × 10-10 m makes an angle of 20° with a set of planes in a crystal causing first order constructive interference, at what angle will the second order line appear?
A) 40° B) 20° C) 43° D) 4.0° E) 11°
The average size of a white dwarf is about the same size as the Earth
Indicate whether the statement is true or false