A. Cardio activities increase your physical strength, while strength-training activities work your heart and lungs.
Answer:18.31 s
Explanation:
Given
hole is h=0.9 m below the water surface
area of of hole ![A=1.30 cm^2](https://tex.z-dn.net/?f=A%3D1.30%20cm%5E2)
Q=10 L
velocity of Flow
![v=\sqrt{2gh}](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B2gh%7D)
![v=\sqrt{2\times 9.8\times 0.9}](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B2%5Ctimes%209.8%5Ctimes%200.9%7D)
![v=\sqrt{17.64}](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B17.64%7D)
![v=4.2 m/s](https://tex.z-dn.net/?f=v%3D4.2%20m%2Fs)
Rate of flow is given by
![\dot{Q}=A\cdot v](https://tex.z-dn.net/?f=%5Cdot%7BQ%7D%3DA%5Ccdot%20v)
![\frac{Q}{t}=A\cdot v](https://tex.z-dn.net/?f=%5Cfrac%7BQ%7D%7Bt%7D%3DA%5Ccdot%20v)
![\frac{10\times 10^{-3}}{t}=1.30\times 10^{-4}\cdot 4.2](https://tex.z-dn.net/?f=%5Cfrac%7B10%5Ctimes%2010%5E%7B-3%7D%7D%7Bt%7D%3D1.30%5Ctimes%2010%5E%7B-4%7D%5Ccdot%204.2)
![t=\frac{10\times 10}{5.46}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7B10%5Ctimes%2010%7D%7B5.46%7D)
Answer:
electrons
Explanation:
You might mean an "oxidation-reduction" reaction, also known as a redox reaction, in which electrons are transferred between chemicals (i.e. the oxidation number changes).
An "oxygen-reduction" reaction is a very specific reaction where oxygen gas is reduced to water or hydrogen peroxide.
Ok I guess you are gonna use arrow/spear. Ok so what I learned is that the best place to hit and fish is the gills or the eye(s) because without the gills fish won't be able to breath.If you hit it on the eye it will take a while to kill the fish.The fish will feel lots of pain and start swim like crazy and probably go away.So i will say the BEST way to kill a fish to to hit it's gills.
In case you don't have any materials to kill fish:
IF you are in the wild with fish and you don't have a hook,spear,arrow, etc. I will recommend you to use a rock that his big but easy to grip.Hit the fish on top of its head just behind the eyes.Or get a stick no too thick or too skinny just like between those and start whittle it to a arrow then aim and shoot.
Hope this helps! =D
Answer:
The gravitational potential energy of the skydiver=![79200 k g m^{2} / s^{2}](https://tex.z-dn.net/?f=79200%20k%20g%20m%5E%7B2%7D%20%2F%20s%5E%7B2%7D)
Given:
Mass of the skydiver=80kg
Distance of the skydiver from the earth=100m
To find:
Gravitational potential energy of the skydiver
<u>Step by Step Explanation:</u>
Solution:
According to the formula, Gravitational Potential Energy (GHE) is calculated as
Where m= Mass of the skydiver
g=Acceleration due to gravity
h=Distance of the skydiver from the earth
Substitute the known values in the above equation we get
![G H E=80 \times 9.8 \times 100](https://tex.z-dn.net/?f=G%20H%20E%3D80%20%5Ctimes%209.8%20%5Ctimes%20100)
![=79200 \mathrm{kg} \mathrm{m}^{2} / \mathrm{s}^{2}](https://tex.z-dn.net/?f=%3D79200%20%5Cmathrm%7Bkg%7D%20%5Cmathrm%7Bm%7D%5E%7B2%7D%20%2F%20%5Cmathrm%7Bs%7D%5E%7B2%7D)
Result:
Thus the gravitational potential energy of the skydiver is =![79200 k g m^{2} / s^{2}](https://tex.z-dn.net/?f=79200%20k%20g%20m%5E%7B2%7D%20%2F%20s%5E%7B2%7D)