Answer:
Explanation:
Molecules within a liquid are pulled in all directions by intermolecular forces; there is no tendency for them to be pulled in any one way. However, molecules at the surface are pulled downward and sideways by other molecules, but not upward away from the surface. These intermolecular attractions thus tend to pull the molecules into the liquid and cause the surface to tighten like an elastic film.
A measure of the elastic force in the surface of a liquid is surface tension. The <em>surface tension</em><em> is the amount of energy required to stretch or increase the surface of a liquid by a unit area</em>. Surface tension enables small insects, like the water strider, to “walk” on water.
The answer is the 1st statement.
The part of the microscope that supports both the ocular lens and the revolving nosepiece is called the <u>head.</u>
The microscope is a device that is used to examine smaller-sized objects that can not be seen with bare eyes.
The most commonly used microscopic devices are the electron microscope and light microscope.
Due to its high resolving power and powerful lenses, it can see small objects of sizes ranging between 10^-3 millimeters and 0.2 micrometers.
Moreover, it is used to see objects at uni and multi-cellular level allowing the scientists to observe organelles such as mitochondria and nuclei in a cell.
If you need to learn more about microscopes click here:
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Answer: enable them to imprint on the facility
Explanation:
The addition of the chemicals to the river will help the fishes to recognize that this was their native habitat where they got birth and grew. This will act as a imprint formed by the facility which will help the fishes to recognize the water of the facility. This will help in increasing the number of fishes which return back to the facility.
