Answer:
Work input = 1620
Explanation:
Given the following data;
Work output = 810
Efficiency = 50%
To find the work input;
Mathematically, efficiency is given by the formula;
Substituting into the formula, we have;
![50 = \frac {810}{WI} * 100](https://tex.z-dn.net/?f=%2050%20%3D%20%5Cfrac%20%7B810%7D%7BWI%7D%20%2A%20100%20)
Cross-multiplying, we have;
![WI = \frac {81000}{50}](https://tex.z-dn.net/?f=%20WI%20%3D%20%5Cfrac%20%7B81000%7D%7B50%7D%20%20)
Work input = 1620
Answer:
magnification will be -0.025
Explanation:
We have given the radius of curvature = 12 cm
And object distance = 3 m
So focal length ![f=\frac{R}{2}=\frac{12}{2}=6cm](https://tex.z-dn.net/?f=f%3D%5Cfrac%7BR%7D%7B2%7D%3D%5Cfrac%7B12%7D%7B2%7D%3D6cm)
Now for mirror we know that
So ![\frac{1}{0.06}=\frac{1}{3}+\frac{1}{v}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B0.06%7D%3D%5Cfrac%7B1%7D%7B3%7D%2B%5Cfrac%7B1%7D%7Bv%7D)
![16.66-0.333=\frac{1}{v}](https://tex.z-dn.net/?f=16.66-0.333%3D%5Cfrac%7B1%7D%7Bv%7D)
v = 0.750 m
Now magnification of the mirror is ![m=\frac{-v}{u}=\frac{-0.750}{3}=-0.025](https://tex.z-dn.net/?f=m%3D%5Cfrac%7B-v%7D%7Bu%7D%3D%5Cfrac%7B-0.750%7D%7B3%7D%3D-0.025)
The third law of thermodynamics is concerned about the entropy of the system. This states that the entropy of the perfect crystal is zero only when the temperature of the crystal is equal to the absolute zero which is equal to zero kelvin.
Answer:
D. move independently.
Explanation:
To be considered a living thing, an organism must be able to move independently.