They provided the intensity in decibels for the problem, but they are unsure by what factor to increase it (I) to make the sound loud enough for the elderly person to hear.
Neglect f entirely.
The following equation must be used to convert decibels (dB) to I:
I=(10^(dB/10))*10^-12
Divide the elder person's dB by the younger person's dB after doing this for each dB.
After putting values and solving
we get,
1.8372093023.
So, the final answer is 1.8372093023.
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The answer OC. It can be changed only if all scientists approve the change
Explanation:
tilting it will raise the height of its center of gravity.
As we know that gravitational potential energy is given by
here we have
m = mass = 120 kg
h = height = 8.2 m
now from above formula
so above is the gravitational potential energy of the couch
It would be D I believe! Depending on the angle of the mirror and distance positioned!
