Answer:
Kindly, see the attached image.
Explanation:
As clear in the attached image:
- It represents the cooling curve of water.
- It starts from 20°C, the water exists in the liquid phase.
- With time the temperature is decreased, reaching 0°C, the two phases (liquid and solid) are co-exist.
- Then, with further cooling and under 0°C reaching -20°C, all the water are exist in the solid phase (Ice).
<em>Kindly, see the attached image that clarify the cooling graph of water as it passes from 20°C to –20°C. </em>
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Answer:
Experiment, analysis, research, purpose, hypothesis and conclusion.
Answer:
See Explanation
Explanation:
Wind is a renewable source of energy widely used as a source of energy in order to minimize the pollution that results from some other sources of non renewable energy.
Wind energy has the advantage of;
1) being a renewable source of energy hence it can be reused and it is not easily depleted.
2) it does not lead to any form of environmental pollution.
On the other hand, a lot of space is required in order to mount as many windmills as possible in order to generate enough electricity to serve a large area. Thus, the disadvantages of wind energy are;
1) A large expanse of land is required in order to generate a meaningful quantity of energy.
2) The occurrence of wind is inconsistent hence generation of energy is not steady.
There are two non metals therefore it’s covalent bonds if it was ionic then it would be a metal and a non metal combine . In this case we can see that oxygen is not a metal
