Recent content by dansics

The question I'm currently working on: When 0.6 kg of an object at 6 degree Celsius is put inside a beaker of water of mass 1.2Kg at 28 degree Celsius, the final temperature of water is 26 degree Celsius. Assuming no heat lost to the surroundings and the heat absorbed by the beaker is...

This is the question which I'm working on: When an animal dies the radioctive carbon content of its body has an activity of 12 counts per gram per minute. Some animal remains are found to have an activity of 3 counts per gram per minute. If the half life of radioactive carbon id 5000 years,how...

emm..so in 10 years, the mass is reduced to 6 g and in 20 years the mass is then reduced to 3g? Am i right?

the defination of half-life is the time-taken for half the original unstable radioactive nuclei to decay.

hello..im new to nuclear physics and i have problems attempting helf life questions.. hope you can help me with this question.. The half-life of a given radioactive isotope is 10 years. What is the mass of this isotope remaining undecayed after 20 years if the original mass was 12g? thank you..