The number of protons
number of neutrons=the mass number- number of protons
14-6=8
Answer:-683 cal
Explanation:
Given
Heat released by system Q=-255 cal
as heat released is taken as negative and vice-versa
Work done by system W=428 cal
From First law of thermodynamics
=change in internal Energy

We can find the force by using the following formula;
N = ma + mg
Fa = ma = 76 x 1.2 = 91.2
Fg = mg = 76 x 9.8 = 744.8
N = 91.2 + 744.8 = 836
So, the force is 836 N.
The answer to that would be that
they require so its mandatory for mechanical waves to travel through a medium
Answer:
it increases the amplitude of the wave as it propagates.
Explanation: