Answer:
chemical and physical changes
Energy is extremely useful
As humans have always used energy, in the ancient times it was really only thermal, from burning wood for warmth and preparing food, then people learned to use animal's energy, and things moved on from there, getting into more complex stuff like we have today.
Life without energy from various sources is unimaginable today
D. The reaction occurring in the forward direction is favored.
<span>In a reversible reaction, both the forward and reverse reactions take place (at equilibrium) </span>
<span>A. at the same rate </span>
<span>Which of the following is untrue concerning a reversible reaction? (at equilibrium) </span>
<span>D. The reaction could spend more time in the reverse direction than in the forward direction. </span>
<span>A reversible reaction </span>
<span>C. always starts off in the forward direction. </span>
<span>All reversible reactions will reach chemical _____. </span>
<span>D. equilibrium</span>
For the answer to the question above,
1∙5µm² = ? m²
1m * 1m = 1m² But 1m = 1,000,000µm = 1x 10^6µm 1x10^6µm * 1x10^6µm = 1m² 1x 10^12µm² = 1m² (Now, try dividing both sides by 1x10^12). 1x10^12µm² /(1x10^12) = 1m² /(1x10^12) 1µm² = 0∙000 000 000 001 m² (multiply both sides by by 1∙5). 1∙5µm² = 0∙000 000 000 0015 m²
1∙5µm² = 1∙5x 10^-12 m²
I hope this helps
Answer: Acid rain.
Explanation:
According to some experts, acid precipitation can lead to acid rain. Acid rain is a product of chemical reactions caused by the release of compounds such as sulfur dioxide and nitrogen oxides into the air. These substances can form in the atmosphere itself and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.
There are specific theories that nitrogen oxides cause acid rain, in other sulfur oxides, which are produced by the combustion of coal or petroleum products, for example, in thermal power plants, automobile engines, and plants for the production and purification of metals. With water vapor, they produce nitric or sulfuric acid, respectively. This natural disaster is very bad for flora and fauna, it has a particular negative reflection on forests and the aquatic world, especially fish.
