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ArbitrLikvidat [17]
4 years ago
10

Modern wind turbines are larger than they appear, and despite their apparently lazy motion, the speed of the blades tips can be

quite high- many times higher than the wind speed. a typical modern turbine has blades 56 m long that spin at 13 rpm. at the tip of a blade, what are (a) the speed and (b) the centripetal acceleration?
Physics
1 answer:
Cloud [144]4 years ago
4 0
<span>The speeds of a modern turbine that has blades that are 56 m long averages around 40 mph. It varies by how much rpm's it uses at the given time. The lower the rpm's, the lower mph it will be. Likewise, the higher the rpm's, the higher mph is will be.</span>
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Describe the path that light waves take when you see your image in a mirror
ICE Princess25 [194]
Describe the path light waves take when you see your image in the mirror?

<span>light strikes your face and bounces off of it. then, light is reflected off your face and into the mirror. i is hen reflected into your eyes.</span>

7 0
3 years ago
When an object of mass m1 is hung on a vertical spring and set into vertical simple harmonic motion, its frequency is 12Hz. When
anzhelika [568]

Answer:

Explanation:

Given

When m_1 mass is attached to the spring its frequency is f_1=12\ Hz

when another mass m_2 is attached to m_1 , frequency changes to f_2=4\ Hz

frequency of spring mass system is given by

f=\frac{1}{2\pi }\sqrt{\frac{k}{m}}

for m_1

f_1=\frac{1}{2\pi }\sqrt{\frac{k}{m_1}}

12=\frac{1}{2\pi }\sqrt{\frac{k}{m_1}}-----1

for m_1 and m_2

f_2=\frac{1}{2\pi }\sqrt{\frac{k}{m_1+m_2}}

4=\frac{1}{2\pi }\sqrt{\frac{k}{m_1+m_2}}----2

divide 1 and 2

3=\sqrt{\frac{m_1+m_2}{m_1}}

squaring

9=1+\frac{m_2}{m_1}

\frac{m_2}{m_1}=8

   

8 0
3 years ago
A lunar eclipse occurs only when the Moon is new. A lunar eclipse occurs only when the Moon is new. True False
Fittoniya [83]

False. False.

A lunar eclipse occurs only when the moon is full.

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7 0
4 years ago
What is actually responsible for the "sensation of force" that causes concussions for many professional football
Anit [1.1K]

Answer:

Acceleration.

Explanation:

American football is one of the sports with the highest physical contact, along with boxing, mixed martial arts and rugby. Therefore, the risk of injury for players who play the sport is higher. However, many injuries in this sport have to do with blows to the head, where concussions occur that generate small neuronal short circuits due to the impact, which can cause fainting, amnesia and even vomiting.

This type of injury occurs due to the acceleration of the players when impacting their rival, which increases their strength (since it is known that the greater the acceleration the weight acquires a greater impact force).

8 0
3 years ago
¿por qué vías o medios llegan las enfermedades a nuestro organismo?​
Law Incorporation [45]

Answer:

Las enfermedades infecciosas son causadas por gérmenes. Hay muchas formas diferentes de contraer una enfermedad infecciosa: A través del contacto directo con una persona que está enferma. Esto incluye besarse, tocarse, estornudar, toser y tener contacto sexual.

Explanation:

:)

8 0
3 years ago
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