Many radioisotopes have important industrial, medical, and research applications. one such radioisotope is 60co, which has a half-life of 5.2 yr and decays by the emission of a beta particle (energy 0.31 mev) and two gamma photons (energies 1.17 mev and 1.33 mev). a scientist wishes to prepare a 60co sealed source that will have an activity of at least 10 ci after 30 months of use. what is the minimum initial mass of 60co required?

momentum of soft ball three times less than baskey ball

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!