The answer is (4). You may recall hearing about the "sea of electrons" model of metals. Metals represent the ultimate case of delocalized (shared) valence electrons, and these delocalized valence electrons are what freely move around, conducting current through the body of the metal.
Answer:
Conductivity meter
Explanation:
A conductivity meter is normally used to measure the amount of electrical current or conductance in a solution. Conductivity is most useful in determining the overall health of a natural water body.
A pH paper is used to determine the pH of a solution. This is done by dipping part of the paper into a solution of interest and watching the color change. The pH paper comes in a color-coded scale indicating the pH that something has when the paper turns a certain color.
An indicator is an organic compound that changes its colour depending on the pH of the solution.
Since neutralization reaction can only be monitored by monitoring the pH of the solution, a conductivity meter cannot be used to monitor the progress of a neutralization reaction since it does not monitor the change in pH of the system under study.
Answer: D) filtration of fluids to eliminate microorganisms
Explanation:
Lister is also called father of antiseptic surgery because he introduced the methods to prevent the growth of microbes and contamination during surgical microbes. He was the professor of surgery. He used carbolic acid which is an antiseptic to clean the exposed wound. He implemented the use of sanitizer for hand-washing, spraying the carbolic acid in the theater, during operations and for sterilizing the instruments.
1) Astronomers use different measurement systems to discuss distance in the universe C) because they allow the numbers to be more manageable.
The numbers are so huge that astronomers need different units to express them.
2) The measurement system with the largest value is C) the Parsec
.
1 Parsec = 3.26 ly = 2.06 × 10⁵ AU
Answer: I am sorry I don't know but my mom say's it doesn't.
Explanation: no explanation