![subject](/tpl/images/cats/fizika.png)
Physics, 25.04.2020 03:26 Princessirisperez0
A friend of yours who is a science fiction fan hears you talk about the fact that astronomers now believe that the mechanism for the large energy output of quasars involves a supermassive black hole. He challenges you, saying something like "Oh come on, every science fiction fan knows that nothing, not even light, can escape from a black hole! How can a black hole be an energy source?" How would you respond to his objection?
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Physics
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/fizika.png)
Physics, 21.06.2019 17:40
Which is not a source of noise pollution? a)airplanes b)acid rain c)machines d)cars
Answers: 2
![question](/tpl/images/cats/fizika.png)
Physics, 21.06.2019 19:40
An ideal spring has a spring constant (force constant) of 2500 n/m, is stretched 4.0 cm, how much elastic potential energy does it possess? (a) 3j (b) 0.00j (c) 1j (d) 2j (e) 4j
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 07:50
The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.
Answers: 2
You know the right answer?
A friend of yours who is a science fiction fan hears you talk about the fact that astronomers now be...
Questions
![question](/tpl/images/cats/mat.png)
Mathematics, 10.02.2020 21:56
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
English, 10.02.2020 21:56
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 10.02.2020 21:57
![question](/tpl/images/cats/mat.png)
Mathematics, 10.02.2020 21:57
![question](/tpl/images/cats/mat.png)
Mathematics, 10.02.2020 21:57
![question](/tpl/images/cats/pravo.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 10.02.2020 21:57
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 10.02.2020 21:57
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/istoriya.png)
History, 10.02.2020 21:57
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 10.02.2020 21:57
![question](/tpl/images/cats/istoriya.png)