An archaeologist finds the 14C in a sample of 3.10 g of material to be decaying at 107 counts per second. A modern 1.00-g sample of the same material decays at 151 counts per second. The half-life of 14C is 5730 y. How old is the sample?
A) 12,200 y
B) 8460 y
C) 25,100 y
D) 12,600 y
A
Physics & Space Science
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If a 5.00 kg mass is moving EAST at 10.0 m/s and a 15.0 kg mass is moving WEST at 10 m/s, what is the velocity of the center of mass of the pair?
A. 10 m/s WEST B. 5.0 m/s EAST C. 5.0 m/s WEST D. 10 m/s EAST
Physics & Space Science
The heaviest element produced by stars or in supernovae is silicon
Indicate whether the statement is true or false
Physics & Space Science
A mixture of helium and another gas diffuses through a porous barrier. The helium diffuses 3.16 times faster than the other type molecule. Identify the other gas
What will be an ideal response?
Physics & Space Science
In a Young's double-slit experiment, how many maxima occur between the 5th-order maxima?
a. 8 b. 9 c. 10 d. 25 e. Three more than the number of minima.
Physics & Space Science