The kinetic energy of the air travelling at 20m/s, which passes through
the circular area in 1 second is 5.4 x 10⁵ J.
What is kinetic energy?
The kinetic energy of an object is associated with its motion. It can be related to the mass and velocity as
K.E = 1/2 mv²
Given the wind is blowing directly towards the wind turbine at a speed of 20 m/s. At this wind speed, 7500 kg of air passes every second through the circular area swept out by the blades.
Substitute the values, we have
K.E = 1/2 x 7500 x (20)²
K.E = 15 x 10⁵ J
Hence, the kinetic energy of the air travelling at 20m/s, which passes through the circular area is 15 x 10⁵ J.
To know more about kinetic energy, refer: brainly.com/question/12669551
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<u><em>[NOTE: THIS IS AN INCOMPLETE QUESTION. THE CMPLETE QUESTION IS: the wind is blowing directly towards the wind turbine at a speed of 12 m/s. at this wind speed, 7500 kg of air passes every second through the circular area swept out by the blades. Calculate the kinetic energy of the air travelling at 12m/s, which passes through the circular area in 1 second.]</em></u>
Answer:
A. Rosenthal's maze bright and maze dull rat study
Explanation:
Rosenthal's maze bright and maze dull rat study was a famous study that he conducted by Fode in 1963. They have chosen two groups of rat and these rats are categorized in the bright maze and dull maze. Even all rats were a standard lab rat and do not breed in one way or another. The result of the study revealed that the students were unconsciously impressed by the performance of the rat to fit the expected result between the maze bright and maze dull rats. Thus Rosenthal would rationalize that the same effect would occur with teachers and students. The study was conducted by the great pygmalion effects or Rosenthal effects that is the concepts that explain the performance by people when greater expectation is put on them
Answer: One of the biggest problems with the aging population is that there is less labor in society, which affects its development.
Explanation: A society that has a large number of elderly people can affect its workforce, which translates into problems in the economy since the elderly on several occasions can not work with the same speed and agility as a person in adulthood.
Another problem is the increase in health costs. It is common for people of advanced age to have complications related to their health, which translates into greater expense for society.
Not where I live it's not.
I believe the answer is: Does the speech pose a threat to the public <span>interest?
One example of such speech would be a speech that call for a destruction of other people's house. This type of speech could either make the target of speech feel unsafe/distress, or make other people actually persuaded to destroy the house. Since both of them are breaking the law, such speech is not protected under free speech.
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