0.9 x 10^4
Let’s break this down into steps.
So to start off with, you need to do 4.5/5 which = 0.9.
Now we can deal with the indices. 10^-3 / 10^-7 means we have to subtract them. Therefore, -3 - -7 = 4. Altogether, we have 0.9 x 10^4
The question states we should leave our answer in standard form.
So our answer is 0.9 x 10^4.
You would divide negative 3 (-3) from both sides to keep the c by itself. When you divide a positive by a negative it becomes negative.
Dividing 15 by -3 would equal -5, so c = -5
Let “t” represent the number of minutes Martha exercises each day. If she needs to exercise *at least* 30 minutes, t has to be equal to or greater than 30, so our inequality would be
t ≥ 30
Answer:
If we assume a temperature of 20ºc and the blood interfacial surface tension is similar to water interfacial surface tension, the diameter of the capillary tube should be 0.933mm.
Step-by-step explanation:
The Jurin law describes the height a fluid can reach in a capillary tube. This law can be written as:
![H=\displaystyle\frac{2\gamma cos(\theta)}{\rho gr}](https://tex.z-dn.net/?f=H%3D%5Cdisplaystyle%5Cfrac%7B2%5Cgamma%20cos%28%5Ctheta%29%7D%7B%5Crho%20gr%7D)
where γ is the interfacial surface tension, θ is the contact angle with the fluid, ρ is the fluid density, g is the gravity acceleration and r is the tube radius.
If we assume that the interfacial surface tension of blood and water are almost the same, γ=0,0728 N/m at 20ºc. Therefore the diameter of the tube will be:
![D=2r=\displaystyle\frac{4\gamma cos(\theta)}{\rho gH}=0.933\cdot 10^{-3}m](https://tex.z-dn.net/?f=D%3D2r%3D%5Cdisplaystyle%5Cfrac%7B4%5Cgamma%20cos%28%5Ctheta%29%7D%7B%5Crho%20gH%7D%3D0.933%5Ccdot%2010%5E%7B-3%7Dm)
Answer:
b
Step-by-step explanation:
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