Answer:
72.04 dB.
Explanation:
The intensity level of 60dB corresponds to the sound intensity 
given by the equation
where 
solving for we get:
Now, when 16 violins are playing the intensity becomes
which on the decibel scale gives
.
Thus, playing 16 violins together gives the intensity level of 72 dB.
Answer
Delta Q = change in thermal energy = c M * change in temperature
change in temperature = Q / (c * M)
change in temperature = -12 J / (390 J / Kg*deg * .012 kg
change in temp = -12 / (390 * .012) = - 2.56 deg C
the answer A. since power is Joules/seconds and energy is rated in Joules
Turbine generators to produce electricity.
Oil flows upward in the wick of a lantern because of the liquid property called <span> capillarity.
</span>Final answer: D<span>
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