Answer:
Following are the solution to this question
Explanation:
please find the complete question in the attached file.
In point a:
The answer is "bottom".
In point b:
Using formula:


I believe it's Seismographs, Tiltmeters, and Correlation Spectometers.
Hopefully I helped ^~^
The correct answer is B. Electrons flow because of electrical attraction and repulsion.
Formula:
F = ma
F: force (N) m: mass (kg) a: acceleration (m/s^2)
Solution:
F = ma
F = 1200 × 1.89
= 2268N
Answer: Hopefully 50trillion DNA strands