Answer:
if its so easy why dont u do it .
Explanation:
Answer:
can't tell if this is question, it is not written correctly
Explanation:
Electrical conductivity is the measure of a material's ability to allow the transport of an electric charge. Its SI is the siemens per meter, (A2s3m−3kg−1) (named after Werner von Siemens) or, more simply, Sm−1. It is the ratio of the current density to the electric field strength.
Answer:
T = 693.147 minutes
Explanation:
The tank is being continuously stirred. So let the salt concentration of the tank at some time t be x in units of kg/L.
Therefore, the total salt in the tank at time t = 1000x kg
Brine water flows into the tank at a rate of 6 L/min which has a concentration of 0.1 kg/L
Hence, the amount of salt that is added to the tank per minute = ![(6\times0.1)kg/min=0.6kg/min](https://tex.z-dn.net/?f=%286%5Ctimes0.1%29kg%2Fmin%3D0.6kg%2Fmin)
Also, there is a continuous outflow from the tank at a rate of 6 L/min.
Hence, amount of salt subtracted from the tank per minute = 6x kg/min
Now, the rate of change of salt concentration in the tank = ![\frac{dx}{dt}](https://tex.z-dn.net/?f=%5Cfrac%7Bdx%7D%7Bdt%7D)
So, the rate of change of salt in the tank can be given by the following equation,
![1000\frac{dx}{dt} =0.6-6x](https://tex.z-dn.net/?f=1000%5Cfrac%7Bdx%7D%7Bdt%7D%20%3D0.6-6x)
or, ![\int\limits^{0.05}_0 {\frac{1000}{0.6-6x} } \, dx =\int\limits^T_0 {} \, dt](https://tex.z-dn.net/?f=%5Cint%5Climits%5E%7B0.05%7D_0%20%7B%5Cfrac%7B1000%7D%7B0.6-6x%7D%20%7D%20%5C%2C%20dx%20%3D%5Cint%5Climits%5ET_0%20%7B%7D%20%5C%2C%20dt)
or, T = 693.147 min (time taken for the tank to reach a salt concentration
of 0.05 kg/L)
In the experiment of free fall bob released a bag of mass 1 lb
so here we can say that initial speed of the bag is Zero
time taken by the bag to free fall is given as
t = 1.5 s
also the acceleration of free fall is given as
a = 9.8 m/s^2
now we will use kinematics equation here for finding the distance of free fall
![d = v_i * t + \frac{1}{2} at^2](https://tex.z-dn.net/?f=d%20%3D%20v_i%20%2A%20t%20%2B%20%5Cfrac%7B1%7D%7B2%7D%20at%5E2)
![d = 0 + \frac{1}{2}*9.8* 1.5^2](https://tex.z-dn.net/?f=d%20%3D%200%20%2B%20%5Cfrac%7B1%7D%7B2%7D%2A9.8%2A%201.5%5E2)
![d = 4.9 * 2.25](https://tex.z-dn.net/?f=d%20%3D%204.9%20%2A%202.25)
![d = 11.025 m](https://tex.z-dn.net/?f=d%20%3D%2011.025%20m)
so the bag will fall down by total distance of 11.025 m from its initial released position.
It takes twice the force to produce the same acceleration in the 2kg rock.