(c) The activity of a sample of potassium-40 is measured 3 times.
The measurements are given below.
4906 Bg
4956 B9
4889 Bg
Which of the following statements explains why the readings are different?
Tick one box

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )

graph question answered .. you think better when you are relaxed and happy

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.