Answer:
Final temperature, ![T_f=21.85^{\circ}](https://tex.z-dn.net/?f=T_f%3D21.85%5E%7B%5Ccirc%7D)
Explanation:
Given that,
Mass of silver ring, m = 4 g
Initial temperature, ![T_i=41^{\circ}C](https://tex.z-dn.net/?f=T_i%3D41%5E%7B%5Ccirc%7DC)
Heat released, Q = -18 J (as heat is released)
Specific heat capacity of silver, ![c=0.235\ J/g\ C](https://tex.z-dn.net/?f=c%3D0.235%5C%20J%2Fg%5C%20C)
To find,
Final temperature
Solution,
The expression for the specific heat is given by :
![Q=mc\Delta T](https://tex.z-dn.net/?f=Q%3Dmc%5CDelta%20T)
![Q=mc(T_f-T_i)](https://tex.z-dn.net/?f=Q%3Dmc%28T_f-T_i%29)
![T_f=\dfrac{-Q}{mc}+T_i](https://tex.z-dn.net/?f=T_f%3D%5Cdfrac%7B-Q%7D%7Bmc%7D%2BT_i)
![T_f=\dfrac{-18}{4\times 0.235}+41](https://tex.z-dn.net/?f=T_f%3D%5Cdfrac%7B-18%7D%7B4%5Ctimes%200.235%7D%2B41)
![T_f=21.85^{\circ}](https://tex.z-dn.net/?f=T_f%3D21.85%5E%7B%5Ccirc%7D)
So, the final temperature of silver is 21.85 degrees Celsius.
The decimal point is placed after two digits starting from the end. For each decimal place, we can write the number divided by 100.
21.12 can be written as
.
Divide the numerator and denominator by 2:
![\frac{2112}{100}= \frac{156}{50}](https://tex.z-dn.net/?f=%20%5Cfrac%7B2112%7D%7B100%7D%3D%20%5Cfrac%7B156%7D%7B50%7D)
The numerator and denominator can be divided by 2 again:
![\frac{78}{25}](https://tex.z-dn.net/?f=%20%5Cfrac%7B78%7D%7B25%7D)
There is no other common factor between numerator and denominator other than 1. Hence, it is the reduced form.
False because light microscopes have low resolve and magnification.
The sun's source of energy is know as nuclear fusion (means to fuse) this process has a small nuclei atoms that join together to form a large nucleus. The result of this process is released energy. The fusion of hydrogen into helium in the sun makes a large amount of energy and this is known as the sun's energy source.
The theories that scientist proposed about the source of the sun's energy was that the sun burned fuel to generate its energy and that gravity was causing the sun to shrink slowly and have its energy released. Also both of these theories were disproved.
.