Answer:
Explanation:
Metals are good conductor of electricity, because as per there structure they have free electrons which help them to move freely within the metal thus helps to maintain a good flow of electricity.
This theory has really helped engineers especially for making powerful batteries. As good batteries means amount of electricity drawn from it will be great and that too for longer time.
Hence such metals are used to make batteries that has more number of free electrons and thus can contribute to generate more electricity.
Read more on Brainly.com - brainly.com/question/12879687#readmore
The answers to all three questions depend on WHICH branch
of Physics you're talking about . . . a piece of information you've
neglected to specify.
Answer:
output work is not possible to have more than 294 kJ value so this is not reasonable claim
Explanation:
As we know that the efficiency of heat engine is given as
![\eta = 1 - \frac{T_2}{T_1}](https://tex.z-dn.net/?f=%5Ceta%20%3D%201%20-%20%5Cfrac%7BT_2%7D%7BT_1%7D)
now we will have
![T_2 = 290 K](https://tex.z-dn.net/?f=T_2%20%3D%20290%20K)
![T_1 = 500 K [tex][tex]\eta = 1 - \frac{290}{500}](https://tex.z-dn.net/?f=T_1%20%3D%20500%20K%20%5Btex%5D%3C%2Fp%3E%3Cp%3E%5Btex%5D%5Ceta%20%3D%201%20-%20%5Cfrac%7B290%7D%7B500%7D)
![\eta = 0.42](https://tex.z-dn.net/?f=%5Ceta%20%3D%200.42)
now we know that efficiency is defined as
![\eta = \frac{Work}{Heat}](https://tex.z-dn.net/?f=%5Ceta%20%3D%20%5Cfrac%7BWork%7D%7BHeat%7D)
![0.42 = \frac{W}{700}](https://tex.z-dn.net/?f=0.42%20%3D%20%5Cfrac%7BW%7D%7B700%7D)
![W = 294 kJ](https://tex.z-dn.net/?f=W%20%3D%20294%20kJ)
So output work is not possible to have more than 294 kJ value
Answer:
The approximate combined sound intensity is ![I_{T}=1.1\times10^{-4}W/m^{2}](https://tex.z-dn.net/?f=I_%7BT%7D%3D1.1%5Ctimes10%5E%7B-4%7DW%2Fm%5E%7B2%7D)
Explanation:
The decibel scale intensity for busy traffic is 80 dB. so intensity will be
, therefore ![I_{1}=1\times10^{8}I_{0}=1\times10^{8} * 1\times10^{-12}W/m^{2}=1\times10^{-4}W/m^{2}](https://tex.z-dn.net/?f=I_%7B1%7D%3D1%5Ctimes10%5E%7B8%7DI_%7B0%7D%3D1%5Ctimes10%5E%7B8%7D%20%2A%201%5Ctimes10%5E%7B-12%7DW%2Fm%5E%7B2%7D%3D1%5Ctimes10%5E%7B-4%7DW%2Fm%5E%7B2%7D)
In the same way for the loud conversation having a decibel intensity of 70 dB.
, therefore ![I_{2}=1\times10^{7}I_{0}=1\times10^{7} * 1\times10^{-12}W/m^{2}=1\times10^{-5}W/m^{2}](https://tex.z-dn.net/?f=I_%7B2%7D%3D1%5Ctimes10%5E%7B7%7DI_%7B0%7D%3D1%5Ctimes10%5E%7B7%7D%20%2A%201%5Ctimes10%5E%7B-12%7DW%2Fm%5E%7B2%7D%3D1%5Ctimes10%5E%7B-5%7DW%2Fm%5E%7B2%7D)
Finally we add both of them
, is the approximate combined sound intensity.