Answer:
history threat
Explanation:
Based on the information provided within the question it can be said that the problem that is most likely affecting this experiment is history threat. This term refers to the way groups differ based on history events. Since the groups that arrived the first day wanted to see something new, once they did foot traffic lowered to normal levels because those people have already seen the museum.
Answer:
Option B is the only correct answer.
Explanation:
Option A is not correct as Italy relies the most on services.
Option B is correct as more than half of people in Poland are relying on service industry.
Option C is not correct as in none of the mentioned countries industry has 50 percent on involvement in economy.
Option D is not correct as in France for example it includes only 4 percent.
<u>The acids DO NOT return the pink phenolphthalein indicator. </u>Phenolphthalein in acidic solutions remains colorless but in basic solutions takes a pink color. Phenolphthalein is a weak acid. The indicator changes color, it can be magenta or pink with a pH value of 10.
The phenomenon of brightness constancy illustrates that our perception of a surface's brightness takes into account, and adjusts for, the level of surrounding illumination
What is brightness constancy?
Our visual ability to perceive objects as having the same brightness level even when the level of lighting changes is known as brightness constancy.
For instance, a white object will appear to be the same shade of white regardless of the amount of light it is exposed to, be it bright sunlight during the day or gentle lamplight at night. The colour of white appears to be the same even when the lighting has altered. As long as the object and its surroundings are illuminated by light of the same intensity, the object will maintain brightness constancy. When the brightness of the background and the item are not the same, brightness constancy is not preserved. If the background is lighter than the object, it will appear darker.
To learn more about brightness constancy, visit:
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