Tissues are a group of cells that work together to perform a specific function
The reaction of sodium and chlorine to form salt has the following properties:
1- It gives out (releases) heat. This means that it is an exothermal reaction
2- A new compound is formed and the components of this compound cannot be separated by physical means. This means that a chemical change occurred.
Based on this:
The reaction of sodium and chlorine to form salt is best described as an<span> exothermic chemical change reaction.</span>
No icicles are water made up of atoms not cells
Answer:
The nichrome wire is dirty.
The solution is contaminated.
Explanation:
If the nichrome wire is dirty, it may contain sodium contaminants which may be responsible for the yellow flame. The nichrome wire is first inserted into the flame without the sample to check for impurities.
The test solution may also have been contaminated. This leads to the appearance of a colour different from the expected colour of the test cation in the solution.
Answer:I beams can withstand greater Moment compared to other beams like rectangular beam when given the same stress.
Rectangular beams are better for casting concrete beams, and for making beams of high and low moment of inertia and its centriod is easy to understand.
Explanation: I beams are beams usually used in metal work and in making beams of high moments of inertia.
Rectangular beams are beams whose centroid ( the geometric center of a regular rectangular beam) are easily identifiable and they can be built to give high and low moment of inertia. This is one of the advantage of using rectangular beams.