The current is defined as the amount of charge Q that passes through a given point of a wire in a time
![\Delta t](https://tex.z-dn.net/?f=%5CDelta%20t)
:
![I= \frac{Q}{\Delta t}](https://tex.z-dn.net/?f=I%3D%20%5Cfrac%7BQ%7D%7B%5CDelta%20t%7D%20)
Since I=500 A and the time interval is
![\Delta t=4.0 min=240 s](https://tex.z-dn.net/?f=%5CDelta%20t%3D4.0%20min%3D240%20s)
the charge is
![Q=I \Delta t=(500 A)(240 s)=1.2 \cdot 10^5 C](https://tex.z-dn.net/?f=Q%3DI%20%5CDelta%20t%3D%28500%20A%29%28240%20s%29%3D1.2%20%5Ccdot%2010%5E5%20C)
One electron has a charge of
![q=1.6 \cdot 10^{-19}C](https://tex.z-dn.net/?f=q%3D1.6%20%5Ccdot%2010%5E%7B-19%7DC)
, therefore the number of electrons that pass a point in the wire during 4 minutes is
![N= \frac{Q}{q}= \frac{1.2 \cdot 10^5 C}{1.6 \cdot 10^{-19}C}=7.5 \cdot 10^{23}](https://tex.z-dn.net/?f=N%3D%20%5Cfrac%7BQ%7D%7Bq%7D%3D%20%5Cfrac%7B1.2%20%5Ccdot%2010%5E5%20C%7D%7B1.6%20%5Ccdot%2010%5E%7B-19%7DC%7D%3D7.5%20%5Ccdot%2010%5E%7B23%7D%20%20)
electrons
The ant would drag the sugar 500m
Good luck!
Answer:
configuration of string:
Node - Antinode - Node or N-A-N
This is 1/2 wavelength since a full wavelength is N-A-N-A-N
f (fundamental) = V / wavelength
F0 = 300 m/s / 1 m = 100 / sec
F1 = 300 m/s / .5 m = 600 / sec
Each increase is a multiple of the fundamental since the wavelength
increases by 1/2 wavelength to keep nodes at both ends of the string
Since there is no decimal point in the number given above, the counting for the number of the significant figures will start from the left. Then, the first zero from the left is insignificant. Therefore, in this number there are 6 significant figures.
Answer : When we increase the temperature of an exothermic reaction the equilibrium will shift to the left direction i.e, towards the reactant.
Explanation :
Le-Chatelier's principle : This principle states that if any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.
As the given reaction is an exothermic reaction in which the heat is released during a chemical reaction. That means the temperature is decreased on the reactant side.
For an exothermic reaction, heat is released during a chemical reaction and is written on the product side.
![A\rightleftharpoons B+\text{ heat}](https://tex.z-dn.net/?f=A%5Crightleftharpoons%20B%2B%5Ctext%7B%20heat%7D)
If the temperature is increases in the equilibrium then the equilibrium will shift in the direction where, temperature is getting decreased. Thus, the reaction will shift to the left direction i.e, towards the reactant.
Hence, when we increase the temperature of an exothermic reaction the equilibrium will shift to the left direction i.e, towards the reactant.