Answer:
When an aircraft is flying at high speeds, the airflow around the wings undergoes various changes. One of these changes is the formation of shock waves, which occur when the airflow reaches or exceeds the speed of sound (Mach 1). These shock waves are caused by the compression of air molecules and can have an impact on the aircraft's performance.
In the case of a swept wing aircraft, the wings are designed with a backward angle (sweep) relative to the fuselage. This sweep helps delay the onset of shock waves and reduces the drag caused by airflow reaching Mach 1. However, at some point along the wing's leading edge, the airflow will reach Mach 1, forming a shock wave.
The exact location where airflow first reaches Mach 1 on a swept wing aircraft can vary depending on factors such as the wing's sweep angle, the aircraft's speed, and its specific design. Therefore, it is important to consider these factors when determining where the airflow first reaches Mach 1 on a specific aircraft.
Answer:
A. long-distance trade
Explanation:
A. primarily water
B. liquid lava
C. molten metal
D. unknown materials
2. The Appalachian Mountains are approximately 480 million years old, making them the oldest mountains in North America. The Appalachian Mountains are folded mountains that were once as high as 20,000 feet. Now they reach to about 3,000 feet. How did these mountains form?
Folded mountains occur when two plates of the Earth's crust push against each other at a convergent plate boundary.
Folded mountains occur when two plates of the Earth's crust push against each other at a convergent plate boundary.
A. Folded mountains are the result of many volcanoes erupting all at the same time..
b. Folded mountains occur when two plates of the Earth's crust separate at divergent plate boundaries.
c. Folded mountains form over millions of years as sediments are deposited and build up.
3. The electric field of the earth is produced in part by the flow of hot liquid iron near the earth's core.
A. true
B. false
4. Virginia’s Blue Ridge Mountains were once among the tallest in the world, similar in altitude to the Himalayas of today. This would still be the case if not for the process of erosion.
A. true
b false
The correct answer to this open question is the following.
In a recent survey, it was observed that many Asian youths have started watching American sitcoms. Moreover, they have started adopting American lifestyles as well. This is an example of cultural assimilation.
When we refer to the term cultural assimilation, we mean that a minority group is influenced by the culture, customs, or traditions of a dominant group. In this case, American Mass Media can reach not only US audiences but distant audiences in faraway countries, Technology like satellite TV, the internet, and social media, facilitates the assimilation of media contents that are exported to other cultures of the world.