C. sulfur dioxide, carbon dioxide, and
nitrogen oxides
These three chemical compounds play a
role in the chemistry of acid rain or acid precipitation. These compounds are
then in the process as they evaporate are converted into acids, mainly, nitric
acid and sulfuric acid. These toxic gases that composes acid precipitation is
actually caused by industries, factories or plants that utilizes such chemicals
and then uses a humongous amount which then is released in during the process
of certain products or manufactured objects.
Answer: D
Explanation:
they are all odorless, colorless, monatomic gases with very low chemical reactivity.
Brainliest?
The real answer would be 16.5 but since you want to have a full number it would be 16
Explanation:
It is given that,
The acceleration of a particle,
(negative as the particle is decelerating)
Initial distance, x₁ = 20 m
Initial time, t₁ = 4 s
New distance x₂ = 4 m
Velocity, v = 10 m/s
(A) Calculating initial distance using second equation of motion as :
![x_1=ut_1+\dfrac{1}{2}at^2](https://tex.z-dn.net/?f=x_1%3Dut_1%2B%5Cdfrac%7B1%7D%7B2%7Dat%5E2)
![20=4u+\dfrac{1}{2}(-8)\times 4^2](https://tex.z-dn.net/?f=20%3D4u%2B%5Cdfrac%7B1%7D%7B2%7D%28-8%29%5Ctimes%204%5E2)
u = 21 m/s
When velocity of the particle is zero, time taken is t (say). Using first equation of motion as :
![v=u+at](https://tex.z-dn.net/?f=v%3Du%2Bat)
![0=21+(-8)t](https://tex.z-dn.net/?f=0%3D21%2B%28-8%29t)
t = 2.62 seconds
So, the velocity of the particle is zero at t = 2.62 seconds.
(B) Velocity at t = 11 s
![v=21+(-8)\times 11](https://tex.z-dn.net/?f=v%3D21%2B%28-8%29%5Ctimes%2011)
v = 13 m/s
Total distance covered at t = 11 s. The overall path travelled by the particle during its entire journey is called total distance covered.
![d=ut+\dfrac{1}{2}at^2+|ut+\dfrac{1}{2}at^2|](https://tex.z-dn.net/?f=d%3Dut%2B%5Cdfrac%7B1%7D%7B2%7Dat%5E2%2B%7Cut%2B%5Cdfrac%7B1%7D%7B2%7Dat%5E2%7C)
![d=21\times 2.62+\dfrac{1}{2}\times (-8)(2.62)^2+|21\times 8.38+\dfrac{1}{2}\times (-8)(8.38)^2|](https://tex.z-dn.net/?f=d%3D21%5Ctimes%202.62%2B%5Cdfrac%7B1%7D%7B2%7D%5Ctimes%20%28-8%29%282.62%29%5E2%2B%7C21%5Ctimes%208.38%2B%5Cdfrac%7B1%7D%7B2%7D%5Ctimes%20%28-8%29%288.38%29%5E2%7C)
d = 132.48 m
So, the distance travelled by the particle at t = 11 seconds is 132.48 meters.