Question

question 4 (1 point) which was leonardo da vincis greatest contribution to modern aviation? (2.a) a he described flight similar to that of birds b he designed and tested the aeroscrew c he analyzed the four forces of flight d he invented the modern - day jet engine question 5 (1 point) what are the main parts of a hot air balloon? (2.0) a nylon, plastic, and glue b propellers, basket, and heat c bag, gondola, and propane d basket, burner, and envelope question 6 (1 point) ____ is the ability or tendency to float in air, in water, or some other fluid. (2.b) a density b buoyancy c flotation d lift question 7 (1 point) as a scientist, inventor and engineer, leonardo da vinci used a methodical approach to study topics, including (2.a) a built and tested many designs of his engineering inventions b drew precise illustrations with detailed descriptions about the subject c relied on others inventions and improved upon them

Explanation:

• Question 4: Leonardo da Vinci analyzed the four forces of flight which was a fundamental contribution to modern aviation understanding. He didn't invent the modern - day jet engine and his work was more about theoretical and design - based analysis rather than just describing flight as a basic idea or designing and testing screws specifically related to modern aviation in the way the option implies.
• Question 5: The main parts of a hot - air balloon are the basket (for passengers and equipment), the burner (to heat the air), and the envelope (the fabric part that holds the hot air).
• Question 6: Buoyancy is defined as the ability or tendency to float in air, water, or some other fluid. Density is related to mass per unit volume, flotation is a general term for the state of floating and lift is more related to aerodynamic forces in some cases like in aircraft.
• Question 7: Leonardo da Vinci drew precise illustrations with detailed descriptions about the subjects he studied as part of his methodical approach. He did build and test some inventions but his illustrations were a key part of his study method and he didn't primarily rely on others' inventions to improve upon.

Answer:

• Question 4: c
• Question 5: d
• Question 6: b
• Question 7: b