The second law of thermodynamics imposes what limit on the efficiency of a heat engine? The second law of thermodynamics imposes
1 answer:
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Answer:
a)
The velocity increase by a factor of
b)
The velocity decrease by a factor of 2.
c)
The velocity increase by a factor of 2
d)
The velocity not changes.
Explanation:
For this case we know that the velocity is
represent the final velocity after the changes specified,
Part a
The formula for the speed of a wave in a string is given by:
And the linear density is defined as:
And if we replace this we got:
If the tension mass is doubled we have this:
The velocity increase by a factor of
Part b
If we mass is quadrupled we have this:
The velocity decrease by a factor of 2.
Part c
If the length is quadrupled we have this:
The velocity increase by a factor of 2
Part d
For this case we know that the mass and the length are both quadrupled and we got:
The velocity not changes.