<h3>Answer</h3>
At a high temperature above 20° oxygen solubility starts to decrease.
<h3>Explanation</h3>
Oxygen, O2 is a very essential component of water as we can see in its chemical formula h2O.
The solubility of oxygen decreases as temperature increases. This means that warmer water will have less dissolved oxygen than does cooler water.
<h3>Other factors that affects oxygen solubility in water</h3>
Salt levels
higher the salt levels in water, lower will be oxygen in it.
Pressure
Water at lower altitudes can hold more dissolved oxygen than water at higher altitudes because dissolved oxygen will increase as pressure increases.
Lights from other galaxies shifts toward the red end of the spectrum, which shows that the galaxies are moving away from the earth. <em>(A)</em>
Explanation:
Given that,
Charge of the particle, q = 8.4 C
Speed of the particle, v = 40 m/s
Magnitude of magnetic field, B = 0.33 T
Let us assumed to find the magnitude and direction of the magnetic force on the particle. Let 30.0 degrees for one, and 150 degrees for two, with a perpendicular charge. So,
![F=qvB\ \sin\theta](https://tex.z-dn.net/?f=F%3DqvB%5C%20%5Csin%5Ctheta)
![F_1=8.4\times 40\times 0.33\times \ \sin(30)](https://tex.z-dn.net/?f=F_1%3D8.4%5Ctimes%2040%5Ctimes%200.33%5Ctimes%20%5C%20%5Csin%2830%29)
![F_1=55.44\ N](https://tex.z-dn.net/?f=F_1%3D55.44%5C%20N)
If angle is 150 degrees
![F_2=8.4\times 40\times 0.33\times \ \sin(150)](https://tex.z-dn.net/?f=F_2%3D8.4%5Ctimes%2040%5Ctimes%200.33%5Ctimes%20%5C%20%5Csin%28150%29)
![F_2=55.44\ N](https://tex.z-dn.net/?f=F_2%3D55.44%5C%20N)
If angle is 90 degrees
![F_3=8.4\times 40\times 0.33\times \ \sin(90)](https://tex.z-dn.net/?f=F_3%3D8.4%5Ctimes%2040%5Ctimes%200.33%5Ctimes%20%5C%20%5Csin%2890%29)
![F_3=110.88\ N](https://tex.z-dn.net/?f=F_3%3D110.88%5C%20N)
Hence, this is the required solution.
Answer:
1. distance and period of time.
Explanation:
The speed is calculated using the formula ![k = \frac{d}{t}](https://tex.z-dn.net/?f=k%20%3D%20%5Cfrac%7Bd%7D%7Bt%7D)
"k" is the speed, "d" is the distance and "t" is the time.
You need distance and time to calculate the speed.
Speed is how fast an object is going. The direction is irrelevant to speed, not to be confused with velocity, which is speed in a given direction.