Answer:
Ozone layer protects from excessive amount of UV rays coming from the sun
Explanation:
Oxygen is converted into ozone by the following net balanced equation which requires UV light for initiation:
![3 O_2 (g)\rightarrow 2 O_3 (g)](https://tex.z-dn.net/?f=3%20O_2%20%28g%29%5Crightarrow%202%20O_3%20%28g%29)
The process is extremely vital for human life. Let's think about the atmosphere. Ozone layer is also known as a protective layer, since it protects people from harmful ultraviolet radiation that is coming from the sun. In reality, we experience ultraviolet rays from the sun all the time, this is the reason why people get tanned (we wouldn't be able to achieve this with simply visible light). However, ozone layer controls the amount of the UV rays that reach Earth and decreases that number to the level where it becomes harmless to the people living on Earth.
Answer:
Evaporated via combustion.
Explanation:
The loss on ignition (LOI) and Ash content are inorganic analytical techniques used to determine the percentage by mass of hydrocarbon in compounds. This process allows volatile matter and possibly impurities found in a material to evaporate, leaving behind the true chemical constituents of the material.
The 10kg lost could be moisture content of the tree, or other volatile matter which has escaped on combustion of the tree.
I The answer is 42 cubic cm
B. static friction occurs.
Explanation:
When a body is pushed and it does not move, static friction has occurred.
Static friction is a type of friction that keeps a body at rest. It must be overcome before a body at rest can start moving.
- An object in motion experiences a sliding friction.
- Friction is generally defined as the resistance to motion of a body.
- In fluids, it is generally experienced as the viscosity.
- Static friction is the strongest of all the friction.
Learn more:
Friction brainly.com/question/7174363
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