Birds exhibit mainly internal development.
Answer:
The height in which the book is dropped from is 1.28 m.
Explanation:
Mass of the book, m = 1.5 kg
initial velocity of the book, u = 0
final velocity of the bok, v = 5 m/s
The height in which the book is dropped from is given by;
v² = u² + 2gh
v² = 0 + 2gh
v² = 2gh
h = v² / 2g
h = (5)² / (2 x 9.8)
h = 1.28 m
Therefore, the height in which the book is dropped from is 1.28 m.
The Answer Is B (: because if it was closed no light could get throw and its not d because air doesnt circulate throw water xD HOPE THIS HELPS ANSWER IS REALLY B ♥
First you find the least common denominator of the two. Then add or subtract and simplify
Answer:
The the specific volume and weight are 79.16m³/k mol and 49 N.
Explanation:
Given that,
Diameter = 3 m
Mass of N₂ = 5 kg
We need to calculate the volume of balloon
Using formula of volume
![V= \dfrac{4}{3}\pi r^3](https://tex.z-dn.net/?f=V%3D%20%5Cdfrac%7B4%7D%7B3%7D%5Cpi%20r%5E3)
![V= \dfrac{4}{3}\pi \times{\dfrac{d}{2}}^3](https://tex.z-dn.net/?f=V%3D%20%5Cdfrac%7B4%7D%7B3%7D%5Cpi%20%5Ctimes%7B%5Cdfrac%7Bd%7D%7B2%7D%7D%5E3)
![V= \dfrac{4}{3}\pi \times(\dfrac{3}{2})^3](https://tex.z-dn.net/?f=V%3D%20%5Cdfrac%7B4%7D%7B3%7D%5Cpi%20%5Ctimes%28%5Cdfrac%7B3%7D%7B2%7D%29%5E3)
![V=14.137\ m^3](https://tex.z-dn.net/?f=V%3D14.137%5C%20m%5E3)
We need to calculate the specific volume in the balloon
![Specific\ volume=\dfrac{Volume}{mass}](https://tex.z-dn.net/?f=%20Specific%5C%20volume%3D%5Cdfrac%7BVolume%7D%7Bmass%7D)
![Specific\ volume=\dfrac{14.137}{5}](https://tex.z-dn.net/?f=Specific%5C%20volume%3D%5Cdfrac%7B14.137%7D%7B5%7D)
![Specific\ volume=2.8274\ m^3/kg](https://tex.z-dn.net/?f=Specific%5C%20volume%3D2.8274%5C%20m%5E3%2Fkg)
Now, Molar mass of N₂ gas is 0.028 kg/mol
Now, Specific volume of N₂ gas in the balloon is
![Specific\ volume =0.028\times2.8274=0.0791672\ m^3/mol](https://tex.z-dn.net/?f=Specific%5C%20volume%20%3D0.028%5Ctimes2.8274%3D0.0791672%5C%20m%5E3%2Fmol)
![Specific\ volume =79.16m^3/kmol](https://tex.z-dn.net/?f=Specific%5C%20volume%20%3D79.16m%5E3%2Fkmol)
(b). We need to calculate the weight of the gas in the balloon
Weight of the balloon is dependent on the mass of the gas.
The weight of the gas is given by
![W = mg](https://tex.z-dn.net/?f=W%20%3D%20mg)
![W = 5\times9.8](https://tex.z-dn.net/?f=W%20%3D%205%5Ctimes9.8)
![W = 49\ N](https://tex.z-dn.net/?f=W%20%3D%2049%5C%20N)
Hence, The the specific volume and weight are 79.16m³/k mol and 49 N.