College Physics Study Set 7
Physics & Astronomy
Quiz 29 :
Looking for Introductory Physics Homework Help?
Q17 Q17 Q17
Certain stars at the end of their lives are thought to collapse combining their protons and electrons together to form a neutron star.Such a star could be thought of as a giant atomic nucleus.If a star of mass equal to that of the sun (M = 1.99 * 1030 kg) collapsed into neutrons (mn = 1.67 * 10-27 kg), what would be the radius of such a star? (Hint: r = r0A1/3, where r0 = 1.20 * 10-15 m).
Q29 Q29 Q29
An ancient building was known to have been built 3 000 years ago.Approximately what proportion of Carbon-14 atoms are yet in the building's wooden framing compared to the number which were present at the time of its construction? (half life of 14C = 5 730 years)
Q61 Q61 Q61
In the four radioactive series, the nuclei decay by either emitting alpha particles or beta particles until they reach the stable end product.Each decay, therefore, results in a mass number change of either 4 (for alpha decay) or 0 (for beta decay).The radium isotope 226Ra is in one of these series.What is the starting isotope in the series containing 226Ra?