Question

What is the kinetic energy in MeV of a β ray that is traveling at 0.9989c ?

Mantles for gas lanterns contain thorium, because it forms an oxide that can survive being heated to incandescence for long periods of time. Natural thorium is almost 100% ²³²Th , with a half-life of 1.408×10¹⁰ y . If an average lantern mantle contains 491 mg of thorium, what is its activity in kBq?

How many thousands of kilograms of water are needed to obtain the 174.3 mol of deuterium, assuming that deuterium is 0.0147% (by number) of natural hydrogen?

Find the length of a side of a cube in microns having a mass of 0.9 kg and the density of nuclear matter, taking this to be 2.25×10¹⁷ kg/m³.

he energy of 38.2 keV is required to ionize a molecule of the gas inside a Geiger tube, thereby producing an ion pair. Suppose a particle of ionizing radiation deposits 0.469 MeV of energy in this Geiger tube. What maximum number of ion pairs can it create?

Answer 1