![arturocarmena10](/avatars/4685.jpg)
arturocarmena10
16.07.2021 •
Physics
What fraction of the most important prescription
drugs come from wild species?
a more than half
b less than a fourth
call prescription drugs
Solved
Show answers
More tips
- F Food and Cooking Choosing the Best Water Filter: Tips and Recommendations...
- H Health and Medicine How Much Does Abortion Cost? Expert Answers and Insights...
- H Health and Medicine Contraceptive Pills After 35: The Importance Of Choosing The Right Medication...
- C Computers and Internet How to Set Up Internet on iPhone? Detailed Guide with Step-by-Step Instructions...
- P Philosophy 8 привычек, чтобы достичь счастливой жизни...
- F Food and Cooking How Many Grams Are In a Tablespoon?...
- G Goods and services How to Choose the Right Iron: Purchase Tips...
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
- H Health and Medicine How to Choose the Right Glasses?...
- H Health and Medicine What vaccines do children need?...
Answers on questions: Physics
- M Mathematics Annie is a financially responsible person who keeps a detailed record of the activities in her bank account. (Score for Question 1: ___ of 5 points) 1. Every year, Annie makes a graph...
- E English Is the human race becoming more or less civilized? explain why in one paragraph....
- B Business Complete the final sentence with the best choice. Business assets have limited useful lives. After being used for a number of years, they must be retired from the business regardless...
Ответ:
More than half
hope it helpsОтвет:
339.12 m/s, 343.31 m/s
Explanation:
For main rotor
diameter, d = 14.4 m
radius, r = 7.2 m
f = 450 rev/min = 450 / 60 = 7.5 rps
Angular speed, ω = 2 x π x f = 2 x 3.14 x 7.5 = 47.1 rad/s
linear speed, v = r x ω = 7.2 x 47.1 = 339.12 m/s
For tail rotor
diameter, d = 1.6 m
radius, r = 0.8 m
f = 4100 rev/min = 4100 / 60 = 68.33 rps
Angular speed, ω = 2 x π x f = 2 x 3.14 x 68.33 = 429.13 rad/s
linear speed, v = r x ω = 0.8 x 429.13 = 343.31 m/s