we know that
Power efficiency is defined as the ratio of the output power divided by the input power:
so
in this problem
Substitute in the formula above
%
therefore
the answer is
the efficient is %
Which instrument is accurate in measuring the dimensions of an object
2 answers:
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Answer:
The temperature change is -633.15K
Explanation:
If we considered the expansion as a reversible one (to be adiabatic is one of the requirements), the work done by expansion can be written as:
Where 2 and 1 subscripts mean the final and the initial state respectively. The equation negative sign says that for an expansion of the gas, the system is making work, so the energy is going out of the system.
Using the ideal gas equation, it is possible to change volume and pressure by temperatures:
So,
This result makes sense considering that the volume increases, so it is expected that the temperature decreases.
Answer:
a. Picture attached
b. V, X
c.
d. It makes sense cosidering that a normal heart beat rate is between 60 and 100 beats per minute (bpm).
Explanation:
First we have to identify the unknown of this problem:
Considering the characteristics of the problem and that distance and velocity are specified, the acceleration is constant, for that reason we use the equations of uniformly accelerated motion as follows:
If we reorganize the equations, considering that and
are zero because motion starts from rest , we have:
Finally, the analysis of the result leaves us to understand why the normal heart beat rate varies between 60 and 100 bpm.
