Answer:
The placebo effect is when an improvement of symptoms is observed, despite using a nonactive treatment. It’s believed to occur due to psychological factors like expectations or classical conditioning.
Research has found that the placebo effect can ease things like pain, fatigue, or depression.
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Aluminium nitrate is acidic as its made by a weak base with a relatively stronger acid.
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Answer:
Directly proportional:
A proportion of two variable quantities. when the ratio of two quantities are constant.
inversely proportional:
when one value decreases at the same rate that the other increases.
Explanation:
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Answer : The change in energy of an atom is, 
Solution : Given,
Wavelength of the photon = 
Formula used :
where,
E = energy of an atom
h = Planck’s constant = 
c = speed of light = 
= wavelength of photon
Now put all the given values in the above formula, we get the energy of an atom.
Therefore, the change in energy of an atom is,
