Answer:
a)54L/min
b)0.845
Explanation:
a) A x V=![A_1V_1+ A_2V_2+A_3V_3](https://tex.z-dn.net/?f=A_1V_1%2B%20A_2V_2%2BA_3V_3)
where suffix 1,2,3 refers to the three pipes.
=27L/min+16L/min+11 L/min
=54L/min
b) A x V=54L/min =>
x v
d= 2 cm
x v = 54
v=
x
->
x
=27L/min =>
x ![v_1](https://tex.z-dn.net/?f=v_1)
= 1.3cm
x
= 27
=
x ![\frac{27}{1.3^2}](https://tex.z-dn.net/?f=%5Cfrac%7B27%7D%7B1.3%5E2%7D)
Next is to find the ratio of speed i.e ![\frac{v}{v_1}](https://tex.z-dn.net/?f=%5Cfrac%7Bv%7D%7Bv_1%7D)
x
/
x
=>
![\frac{1.3^2}{2^2}](https://tex.z-dn.net/?f=%5Cfrac%7B1.3%5E2%7D%7B2%5E2%7D)
= 0.845
Answer:
The duration is ![T =72 \ years /tex]Explanation:From the question we are told that The distance is [tex]D = 35 \ light-years = 35 * 9.46 *10^{15} = 3.311 *10^{17} \ m](https://tex.z-dn.net/?f=T%20%20%3D72%20%5C%20%20years%20%2Ftex%5D%3C%2Fp%3E%3Cp%3EExplanation%3A%3C%2Fp%3E%3Cp%3EFrom%20the%20question%20we%20are%20told%20that%20%3C%2Fp%3E%3Cp%3E%20%20%20%20The%20%20distance%20is%20%20%5Btex%5DD%20%20%3D%20%2035%20%5C%20light-years%20%3D%2035%20%2A%20%209.46%20%2A10%5E%7B15%7D%20%3D%203.311%20%2A10%5E%7B17%7D%20%5C%20%20m%20)
Generally the time it would take for the message to get the the other civilization is mathematically represented as
![t = \frac{D}{c}](https://tex.z-dn.net/?f=t%20%3D%20%20%5Cfrac%7BD%7D%7Bc%7D)
Here c is the speed of light with the value ![c = 3.08 *10^{8} \ m/s](https://tex.z-dn.net/?f=c%20%3D%20%203.08%20%2A10%5E%7B8%7D%20%5C%20%20m%2Fs)
=> ![t = \frac{3.311 *10^{17} }{3.08 *10^{8}}](https://tex.z-dn.net/?f=t%20%3D%20%20%5Cfrac%7B3.311%20%2A10%5E%7B17%7D%20%7D%7B3.08%20%2A10%5E%7B8%7D%7D)
=> ![t = 1.075 *10^9 \ s](https://tex.z-dn.net/?f=t%20%3D%20%201.075%20%2A10%5E9%20%5C%20s)
converting to years
![t = 1.075 *10^9 * 3.17 *10^{-8}](https://tex.z-dn.net/?f=t%20%3D%20%201.075%20%2A10%5E9%20%2A%20%203.17%20%2A10%5E%7B-8%7D%20)
![t = 1.075 *10^9 * 3.17 *10^{-8}](https://tex.z-dn.net/?f=t%20%3D%20%201.075%20%2A10%5E9%20%2A%20%203.17%20%2A10%5E%7B-8%7D%20)
![t = 34 \ years](https://tex.z-dn.net/?f=t%20%3D%20%2034%20%5C%20years%20)
Now the total time taken is mathematically represented as
![T = 2* t + 2 + 2](https://tex.z-dn.net/?f=T%20%20%3D%20%202%2A%20%20t%20%20%2B%20%202%20%2B%202)
=> ![T = 2* 34 + 2 + 2](https://tex.z-dn.net/?f=T%20%20%3D%20%202%2A%2034%20%20%2B%20%202%20%2B%202)
=> [tex]T =72 \ years /tex]
Answer:
they are used in periscopes,for signalling,in kaleidoscopes,to see round dangerous bends
Explanation:
Answer:unbalanced: have direction,Change an objects motion, causes object to accelerate
Balanced:Do not change an objects motion, Net forces equal sum of all forces on object, and Does not equal 0 N
Explanation: Thats all I know Hoped I helped sum