Prova de 2025: Centro de Educação Superior a Distância do Estado do Rio de Janeiro (CEDERJ) — questões com gabarito

By Adam Stockley

Various theoretical designs of reusable launch vehicles (rockets) have been tested during the history of space flight, but they generally proved too expensive or impractical to implement.  

In the 21st century, the rise in industry privatisation led to several companies taking the lead in reusable launcher development. Their focus is on fully-reusable systems.

The potential of reusable rockets to transform the economics of space travel should be evident. Even so, let’s break down the benefits and drawbacks of this technology to understand more.

The most obvious benefit of a reusable rocket is cost savings. Unsurprisingly, it’s much cheaper to refurbish and relaunch a rocket than it is to build a new one. Reusable rockets also use less fuel than their expendable counterparts, making them comparatively better for the environment.

The main disadvantage of reusable rockets is their reduced load capacity. By extension, they must be built to survive the difficulties of launch and re-entry, meaning there is much more extra stabilisation equipment. Therefore, the rockets are heavier.

The bottom line is that now we have a firmer understanding of the concept of reusable launchers, their potential impact is limitless. However, there are some issues to resolve in terms of extra weight and reduced load capacity, but the space industry is very near to perhaps its biggest revolution in terms of cost reduction and accessibility.

Available at: https://www.kdcresource.com/insights-events/therise-of-reusable-rockets-transforming-the-economics-of-spacetravel/. Access 16 out. 2024. Adapted. 

By Adam Stockley

Various theoretical designs of reusable launch vehicles (rockets) have been tested during the history of space flight, but they generally proved too expensive or impractical to implement.  

In the 21st century, the rise in industry privatisation led to several companies taking the lead in reusable launcher development. Their focus is on fully-reusable systems.

The potential of reusable rockets to transform the economics of space travel should be evident. Even so, let’s break down the benefits and drawbacks of this technology to understand more.

The most obvious benefit of a reusable rocket is cost savings. Unsurprisingly, it’s much cheaper to refurbish and relaunch a rocket than it is to build a new one. Reusable rockets also use less fuel than their expendable counterparts, making them comparatively better for the environment.

The main disadvantage of reusable rockets is their reduced load capacity. By extension, they must be built to survive the difficulties of launch and re-entry, meaning there is much more extra stabilisation equipment. Therefore, the rockets are heavier.

The bottom line is that now we have a firmer understanding of the concept of reusable launchers, their potential impact is limitless. However, there are some issues to resolve in terms of extra weight and reduced load capacity, but the space industry is very near to perhaps its biggest revolution in terms of cost reduction and accessibility.

Available at: https://www.kdcresource.com/insights-events/therise-of-reusable-rockets-transforming-the-economics-of-spacetravel/. Access 16 out. 2024. Adapted. 

By Adam Stockley

Various theoretical designs of reusable launch vehicles (rockets) have been tested during the history of space flight, but they generally proved too expensive or impractical to implement.  

In the 21st century, the rise in industry privatisation led to several companies taking the lead in reusable launcher development. Their focus is on fully-reusable systems.

The potential of reusable rockets to transform the economics of space travel should be evident. Even so, let’s break down the benefits and drawbacks of this technology to understand more.

The most obvious benefit of a reusable rocket is cost savings. Unsurprisingly, it’s much cheaper to refurbish and relaunch a rocket than it is to build a new one. Reusable rockets also use less fuel than their expendable counterparts, making them comparatively better for the environment.

The main disadvantage of reusable rockets is their reduced load capacity. By extension, they must be built to survive the difficulties of launch and re-entry, meaning there is much more extra stabilisation equipment. Therefore, the rockets are heavier.

The bottom line is that now we have a firmer understanding of the concept of reusable launchers, their potential impact is limitless. However, there are some issues to resolve in terms of extra weight and reduced load capacity, but the space industry is very near to perhaps its biggest revolution in terms of cost reduction and accessibility.

Available at: https://www.kdcresource.com/insights-events/therise-of-reusable-rockets-transforming-the-economics-of-spacetravel/. Access 16 out. 2024. Adapted. 

By Clément Pessaux

April 29, 2025

According to Bill Gates, artificial intelligence is about to redefine the job market. Among the professions likely to be widely replaced, Gates directly mentions doctors and teachers. Why these specific sectors? AI has the ability to take on complex tasks such as medical diagnosis or personalized learning, making these services more accessible. In fact, in some developing countries where access to education and healthcare remains limited, such advancements could transform daily life.

But this progress raises concerns. Can we really do without human empathy in these fields? And what about the judgment or sensitivity that a machine can never fully reproduce?

On the other hand, there are professions that AI does not seem ready to replace. Gates specifically mentions energy experts, biologists, and developers. These jobs require specialized expertise, as well as creativity and constant adaptability in the face of environmental or technological challenges.

Creativity, strategic thinking, and empathy remain areas where humans will always have the upper hand. Although he recognizes the immense potential of AI, Gates also emphasizes the limits and the need to think about its deployment by keeping humans at the center of priorities.

Available at: https://3dvf.com/en/bill-gates-predicts-ai-willreplace-humans-in-almost-all-fields-except-these-jobs/ Access: 03 may 2025. Adapted.

By Clément Pessaux

April 29, 2025

According to Bill Gates, artificial intelligence is about to redefine the job market. Among the professions likely to be widely replaced, Gates directly mentions doctors and teachers. Why these specific sectors? AI has the ability to take on complex tasks such as medical diagnosis or personalized learning, making these services more accessible. In fact, in some developing countries where access to education and healthcare remains limited, such advancements could transform daily life.

But this progress raises concerns. Can we really do without human empathy in these fields? And what about the judgment or sensitivity that a machine can never fully reproduce?

On the other hand, there are professions that AI does not seem ready to replace. Gates specifically mentions energy experts, biologists, and developers. These jobs require specialized expertise, as well as creativity and constant adaptability in the face of environmental or technological challenges.

Creativity, strategic thinking, and empathy remain areas where humans will always have the upper hand. Although he recognizes the immense potential of AI, Gates also emphasizes the limits and the need to think about its deployment by keeping humans at the center of priorities.

Available at: https://3dvf.com/en/bill-gates-predicts-ai-willreplace-humans-in-almost-all-fields-except-these-jobs/ Access: 03 may 2025. Adapted.

By Clément Pessaux

April 29, 2025

According to Bill Gates, artificial intelligence is about to redefine the job market. Among the professions likely to be widely replaced, Gates directly mentions doctors and teachers. Why these specific sectors? AI has the ability to take on complex tasks such as medical diagnosis or personalized learning, making these services more accessible. In fact, in some developing countries where access to education and healthcare remains limited, such advancements could transform daily life.

But this progress raises concerns. Can we really do without human empathy in these fields? And what about the judgment or sensitivity that a machine can never fully reproduce?

On the other hand, there are professions that AI does not seem ready to replace. Gates specifically mentions energy experts, biologists, and developers. These jobs require specialized expertise, as well as creativity and constant adaptability in the face of environmental or technological challenges.

Creativity, strategic thinking, and empathy remain areas where humans will always have the upper hand. Although he recognizes the immense potential of AI, Gates also emphasizes the limits and the need to think about its deployment by keeping humans at the center of priorities.

Available at: https://3dvf.com/en/bill-gates-predicts-ai-willreplace-humans-in-almost-all-fields-except-these-jobs/ Access: 03 may 2025. Adapted.