Radioactive isotope A has a half-life of one year, while radioactive isotope B has a half-life of one day. If equal numbers of atoms of each are present, which will give the highest reading on a Geiger counter?
1) A
2) B
3) both the same
How much of the original sample of radioactive isotope A will be left at the end of the second year?
4) none
5) one-quarter
6) one-half
7) one-eighth
Answer: 2, 5
You might also like to view...
When the measured quantity 45.67 kg is divided by the measured quantity 3.42 L, the answer should have how many significant figures?
a. Three b. One c. Four d. Two
According to Kepler's laws the Sun is located at one of the foci of Earth's orbit.
Answer the following statement true (T) or false (F)
Projectile Motion: A projectile leaves the ground at 150 m/s and reaches a maximum height of 0.57 km. If there was no air resistance, at what angle above the horizontal did it leave the ground?
Fill in the blank(s) with the appropriate word(s).
Overall, Jupiter's composition is most like that of
A) the Sun. B) Earth. C) a comet. D) an asteroid.