⚠️PLS HELP I HAVE ZERO CLUE AND NEED HELP ASAP DUE AT 12 WILL GOVE BRAINLIEST THANK U⚠️ 1/4th of a sample of thorium-232 remains.

How long has the sample been decaying?

Which produce would best increase the amount of heat energy that is actually gained by calorimeter b

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer

What is the atomic number of an atom that has 6 protons