Answer:
Option C. Is used to cool the drill bit and to flush rock cuttings up and out of the drill hole
Explanation:
Drill mud plays a vital role in the drilling process. Its addition into the well-bore does a lot in enhancing the drilling processes and activities.
Among other importance and function of the drill mud /fluid:
1. It is used to cool off the drill bit
2. It flushes rock cuttings out of the drill hole
3. High pressure control
4. Providing buoyancy
5. Lubrication
Answer:
Explanation:
Angle of depression = 
b = Height of building = 42 feet
p = Distance from the car to the base of the building
From the trigonometric identities we get
The distance from the car to the base of the building is .
Egypt and the people of the Middle East were protected by the desert as can be seen in the lack of attempts from foreign forces for invasion.
Explanation:
Ancient Egypt and the people of the Middle East, primarily Mesopotamia, had several advantages when it came to development and security. The people living in these places were living along the banks of the large rivers, such as:
- Nile River
- Tigris
- Euphrates
These rivers provided fertile deposits, water for drinking and usage, means of transport and traveling, thus the people of this places had excellent basis to develop.
On the other hand, it seems that these people had almost no problems when it came to invading forces outside of the region. The prime reason for this was that the region is dominated by hot, harsh deserts. The people outside of this region didn't dear to cross the deserts and attack, as the chances were that the armies will either die during the crossing of the deserts, or they would be so damaged that they would not achieve anything.
Learn more about Ancient Egypt brainly.com/question/1690599
#learnwithBrainly
