Since height is a basic physical property of length, the height of a classroom ceiling is expressed in meters, or meters, or meters.
There are some physical characteristics of matter, such as length, mass, volume, weight, and so forth, that are dependent on the amount or size of the substance.
As the size or amount of the matter changes, so do these qualities of matter and their values.
A quality of matter that is unrelated to a change in its chemical makeup is called a physical property.
Density, color, hardness, melting and boiling points, and electrical conductivity are a few common examples of physical qualities.
The physical characteristics include color, phase, odor, and boiling point. Reactivity with oxygen is not a physical quality because it depends on the chemical makeup of the thing.
Therefore, meter is used to express the height of your classroom ceiling.
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Sandpaper is scratchy
Benzoic acid is separated from acetanilide using sodium bicarbonate by converting it into sodium benzoate, which is soluble in water. Acetanilide remains unaffected in the mixture.
In the process of separating benzoic acid from acetanilide using sodium bicarbonate, the basic nature of sodium bicarbonate reacts with the acidic benzoic acid, leading to the formation of sodium benzoate. The sodium benzoate is highly soluble in water, allowing it to be easily separated from the acetanilide, which remains insoluble. On the other hand, acetanilide is not affected by the sodium bicarbonate and remains unaffected in the mixture.
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B. lithium (Li)
C. neon (Ne)
D. radon (Rn)
Answer: Option (A) is the correct answer.
Explanation:
It is known that atomic size of atoms decreases on moving from left to right in a period of the periodic table. Whereas atomic size increases on moving from top to bottom in a group.
Lithium and cesium are both alkali metals. On the other hand, both neon and radon are noble gases.
Both cesium and radon belongs to sixth period. Cesium being at the extreme left side is larger in size than radon which is at the extreme right side of periodic table. Therefore, atomic radius of cesium will be larger than atomic radius of radon.
Whereas both lithium and neon belongs to second period. Lithium being at the top left side of periodic table has larger atomic radius than neon which is at the top right side.
Thus, we can conclude that out of the given options cesium has the largest atomic radius.
B
It changes direction when it passes through an opening
С
It changes its speed and wavelength when it passes through an opening
D
It changes direction when it passes from one medium to another
E
It changes its speed and wavelength from one medium to another.
F
It changes direction when it bounces off of a solid surface.
If a sound wave refracts,It changes its speed and wavelength when it bounces off of a solid surface,It changes its speed and wavelength when it passes through an opening, and It changes direction when it passes from one medium to another. Therefore, option A, C and D are correct.
An important case in which sound waves change form or spread out is called refraction. This phenomenon affects the bending of a sound wave owing to changes in the wave's speed.
Refraction is the reason ocean waves near a shore parallel to the beach and why glass lenses can be used to focus light waves.
If the air above the earth is warmed than that at the surface, sound will be change shape back downward toward the surface by refraction. Soundpropagates in all directions from a point source.
Thus, option A, C and D are correct.
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Answer:it’s .gov
Explanation:thanks me later took the test