Answer:
y = 6
Explanation:
Given parameters:
Given equation:
y = 2x + 10
And supposing; x = -2
Unknown:
y = ?
Solution:
We are going to solve this problem by substitution;
y = 2x + 10
since x = -2; input this into the equation to solve for y;
y = 2(-2) + 10 = -4 + 10 = 6
The value of y = 6
Answer:
option c is correct
Explanation:
we know that time rate of change of velocity is called acceleration
so a=v/t
a=12/4
a=3m/s²
Answer:

Explanation:
Let consider that pipe is a horizontal cylinder. The Nusselt number is equal to:
, for
.
Where
is the Rayleigh number associated with the cylinder.
The Rayleigh number is:

By assuming that air behaves ideally, the coefficient of volume expansion is:



The cinematic and dynamic viscosities, thermal conductivity and isobaric specific heat of air at 10 °C and 1 atm are:




The Prandtl number is:



Likewise, the Rayleigh number is:


Finally, the Nusselt number is:
![Nu = \left\{0.6+\frac{0.387\cdot (12.486\times 10^{6})^{\frac{1}{6} }}{\left[1 + \left(\frac{0.559}{0.733}\right)^{\frac{9}{16} }\right]^{\frac{8}{27} }} \right\}^{2}](https://tex.z-dn.net/?f=Nu%20%3D%20%5Cleft%5C%7B0.6%2B%5Cfrac%7B0.387%5Ccdot%20%2812.486%5Ctimes%2010%5E%7B6%7D%29%5E%7B%5Cfrac%7B1%7D%7B6%7D%20%7D%7D%7B%5Cleft%5B1%20%2B%20%5Cleft%28%5Cfrac%7B0.559%7D%7B0.733%7D%5Cright%29%5E%7B%5Cfrac%7B9%7D%7B16%7D%20%7D%5Cright%5D%5E%7B%5Cfrac%7B8%7D%7B27%7D%20%7D%7D%20%20%5Cright%5C%7D%5E%7B2%7D)

Biodiversity is the variety of life in the world or in a particular habitat or ecosystem. destruction, degradation and fragmentation of habitats. reduction of individual survival and reproductive rates through exploitation, pollution and introduction of alien species. Those are the negative impacts