It would be 20 protons left because 1-19= 20
Answer:
Hey there!
The correct answer would be option A. If one body is positively charged and another body is negatively charged, free electrons tend to move from the negatively charged body to the positively charged body
Let me know if this helps :)
Answer:
Test multiple times
Explanation:
the more you test the experiment the better and more accurate result you will have also having a good setup or organized data will help with making it easier to execute the experiment.
Answer:
It is moving from 4s to 8s at a constant speed of 4 cm/s
Explanation:
The graph would show a line with a positive gradient, this would mean that the speed would increase as more time passed. This means that it was accelerating from 0s to 4s. Thus this disproves the first option.
For the second option, we know that this is a speed time graph, so a horizontal line would symbolise constant speed. Therefore, it wouldn't be at rest and also makes the third option correct.
For the last option, the first part is correct in saying that it is 'speeding up' as we do see the speed increase due to the positive gradient. However, from the previous option (which is correct) we know that it isn't at rest and is moving at constant speed. Therefore, the last one is wrong.
And thus, the only correct option is option 3.