Conservation of energy explains that energy can only be transferred between different forms of energy
Answer:
it depends if it is alpha ,beta or gamma
Explanation:
if alpha use paper
if beta use some clothing or aluminium
if it is gamma use lead
Average acceleration is defined as

here



now for x direction we can say



Similarly for Y direction



so above is the acceleration in x and y directions
Answer:
without answers to choose from, I'd say make sure you're using the same shape and sized containers, and they're placed in the same locations at the same time. also you'd probably get a more accurate result by leaving them longer than an hour, more like a day or 2, and do it on multiple different days, when the temperature is different each day and then take an average of those days...