Answer:
70
Explanation:
FAA stands for federal aviation administration.Which offer advisory circular which is a type of publication which provides guidance regarding the airworthiness regulation, training standard of pilots, operational standards.It also regulates the rules related to space and airline.
In this publication the subject matter related to airspace is under 70 subject number
Answer:

Explanation:
As we know that the force equation at the top is given as

now we know that

so we have


so we will have


<span>Soil conservation involves protecting soil quality and preventing erosion.
Answer: A</span>
The third one sliding friction
Explanation:
Answer:
High tides and low tides are caused by the Moon.
Explanation:
The Moon's gravitational pull generates something called the tidal force.