Answer:
Here's what I find
Explanation:
Sodium vapour produces mostly yellow light.
Mercury vapour produces mostly blue light.
A white car reflects all colours back to our eyes.
A coloured car, say green, absorbs all the other colours and reflects the green.
Under a sodium light, a white or a yellow car will appear yellow. A red car will be nearly black because there is no red light to reflect.
Under a mercury light, a white or a blue car will appear blue. A yellow car will be quite dark, but there will be a yellowish tinge because there is some yellow in the Hg spectrum for it to reflect.
The picture below shows a red car and a black car under sodium light. Can you tell which is which?
Answer:
- <u><em>C. The rate of sublimation of the NH₄CI crystals is equal to the rate of solidification of the NH₄CI vapors.</em></u>
<u><em></em></u>
Explanation:
The question is garbled and the reactants and products do not match.
This is the correct question, assuming the products are correctly described:
"Consider the equilibrium system below.
If the system is at dynamic equilibrium, which statement is true?
- A. Sublimation of the NH₄CI crystals stops.
- B. Solidification of the NH₄CI vapors stops.
- C. The rate of sublimation of the NH₄CI crystals is equal to the rate of solidification of the NH₄CI vapors.
- D. The rate of sublimation of the NH₄CI crystals is higher than the rate of solidification of the NH₄CI vapors"
<h2>Solution</h2>
The left side of the equation shows solid<em> NH₄CI</em>. The right side shows gas <em>NH₄CI</em>.
Thus, the equation represents the <em>equilibrium</em> between the formation of <em>crystals</em> (solid) and <em>vapors </em>(gas) of the compound <em>NH₄CI</em>.
The change from solid state to gas state is represented by the <em>forward reaction </em>(fom left to the right). It is named sublimation.
The change from vapors to crystals (named deposition) is represented by the <em>reverse reaction</em> (from right to left).
<em>Dynamic equilibrium</em> means that the molecules continually form vapors and cristals at the same speed. Thus, the final result is that each the total number of molecules of vapors and the total number of molecules of crystals do not change.
In conclusion, <em>"The rate of sublimation of the NH₄CI crystals is equal to the rate of solidification of the NH₄CI vapors" (option C).</em>
Answer:
Genes are segments of DNA that are located on the chromosomes of each cell.
Explanation:
Chromosomes are basically tightly bundled thingies containing genes, DNA, whatever. Phenotype and genotype have nothing to do with chromosomes, that's just how WE describe them.
The scientific form made its way to common usage through the similarities in meaning. A catalyst is a chemical that speeds up the chemical reaction. In the Chernobyl story, the Chernobyl incident is understood as a catalyst for glasnost because it speed up the process of passing and activating the glasnost laws that opened the government policies more to the world and the people.
The term carries almost the same meaning because both a chemical catalyst and an event catalyst speed up the process of either the chemical reaction or the change of something, be it a government policy or a simple event among people or anything similar. Sometimes however, too much usage leads to incorrect usage where the common understanding of catalysts is different form the scientific usage.
It is used differently insofar that in scientific usage, the catalysts don't get affected chemically by the chemical reaction and the reaction itself is not chemically altered. What happens is just that the speed at which occurs is faster. However, in real world usage, it is often used incorrectly as catalysts being responsible for the change. In addition, the catalyst in real world events often influences the events and vice versa, which doesn't happen in chemistry other than increasing the speed. To explain this using Chernobyl, Glasnost wouldn't have happened on its own without the Chernobyl crisis, which means that the crisis is more of a cause than a catalyst that speeds up events.-
Answer:
Velocity is vector quantity. So it needs <em>direction</em> in addoition to <em>speed</em>.
The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of its speed and direction of motion.