Understanding Air Travel and Jet Engines

The video explains why commercial jets fly at high altitudes, highlighting the benefits such as efficiency and comfort due to reduced air resistance and avoidance of weather patterns. It also discusses the challenges of maintaining lift and combustion at these altitudes, requiring larger wings and sufficient oxygen for fuel burning. The optimal altitude for flight is determined by engineers to balance these factors. The video concludes with acknowledgments to contributors.

What is the average cruising altitude of a commercial jet?

• 15 to 20 kilometers

• 12 to 15 kilometers

• 7 1/2 to 11 kilometers

• 3 to 5 kilometers

Why were jets designed to fly at high altitudes?

• To avoid birds

• To reduce air resistance

• To fly faster

• To save fuel

What is one benefit of flying at higher altitudes for passengers?

• Shorter flight times

• More scenic views

• Less turbulence

• Lower ticket prices

What is a challenge of flying at high altitudes?

• Higher fuel consumption

• Increased air pressure

• More air traffic

• Decreased lift

How do engineers compensate for reduced lift at high altitudes?

• By using larger wings

• By flying faster

• By increasing fuel

• By reducing weight

Why can't jets fly too high?

• Lack of air pressure

• Lack of oxygen for combustion

• Increased fuel consumption

• Increased turbulence

What would an aircraft need to fly higher than the current jet altitudes?

• Stronger engines

• More fuel

• Air canisters

• Larger wings

What happens when an aircraft carries air canisters for higher altitudes?

• It becomes a rocket

• It becomes a glider

• It becomes a helicopter

• It becomes a submarine

Who asked the question that led to this SciShow episode?

• YouTube viewers

• Tumblr friends

• Twitter followers

• Facebook fans

Where can viewers submit their questions for SciShow?

• Instagram

• YouTube comments

• Twitter

• Patreon