Answer: A: the electrons move so fast that their mass cannot be measured
Explanation: because they are so fast scientist and other people cannot measure them
Answer:
D
Explanation:
Look at the two of them, if you put them together the image is identical to that of the unknown sample.
Answer:
The rise from A to B is 0.887
Solution:
As per the question:
The following reading of an inverted staff is given as:
A = 2.915
B = -2.028
Here, for inverted staff, the greater reading shows greater elevation and lesser reading shows lower elevation.
Thus
The rise from A to B is given as:
A - B = 2.915 - 2.028 = 0.887