Can someone plz help me plz giving brainliest

yes because it talks about what he pacifically he did and what the results was and he would probably need 2 get a little more data

Explanation:

I believe that the 1st scientist results were valid. If he did the experiment ithout flaws, then his data should be 100%  reliable. Now, the 2ed scientist should go back and redo the experiment incase she had a flaw, or recorded something wrong.

Explanation:

I hope this helps

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.

the answer would be a