Answer:
Current flowing in the cell will be equal to 0.1284 mA
Explanation:
We have given charge q = 3.70 C
And time through which charge is flowing = 8 hour
We know that 1 hour = 60 minutes, and 1 minute = 60 sec
So 1 hour = 60×60 = 3600 sec
So 8 hour = 8×3600 = 28800 sec
We know that current is rate time rate of flow of charge
So current ![i=\frac{q}{t}=\frac{3.70}{28800}=1.284\times 10^{-4}A=0.1284mA](https://tex.z-dn.net/?f=i%3D%5Cfrac%7Bq%7D%7Bt%7D%3D%5Cfrac%7B3.70%7D%7B28800%7D%3D1.284%5Ctimes%2010%5E%7B-4%7DA%3D0.1284mA)
So current flowing in the cell will be equal to 0.1284 mA
Answer:
Continuously changing magnetic field of the Sun
Explanation:
The Sun is made up of plasma and is not solid like our planet. When it rotates the whole of the Sun doesn't rotate with same speed. The equatorial part completes the rotation in just 25 days whereas the poles do it in 35 days. Due to this the magnetic field lines entangle and reorganize them regularly.
The places where the field line exit and enter the surface of the Sun, temperature drops by around 1000 K thus these spots appear black in color and are known as Sun spots.
The magnetic field is not permanent as it will keep changing due to differential rotation. This will result in the change in the no. of location of Sun spots.
If we track the no. of sunspots visible with respect to years we will notice that they follow a cycle of 10.6 years. This is known as Solar cycle in which there comes a solar minima when we see very few sunspots. When it is solar maxima we can see more than 100 sunspots.
Many scientist believed the ocean floor is FLAT
Answer:
η = 1.31
Explanation:
The formula for the refractive index of from air to some other medium is given by the following formula:
![\eta = \frac{c}{v}\\](https://tex.z-dn.net/?f=%5Ceta%20%3D%20%5Cfrac%7Bc%7D%7Bv%7D%5C%5C)
where,
η = refractive index = ?
c = speed of light in air = 3 x 10⁸ m/s
v = speed of light in ice = 2.29 x 10⁸ m/s
Therefore, using these values in the equation we get:
![\eta = \frac{3\ x\ 10^8\ m/s}{2.29\ x\ 10^8\ m/s} \\](https://tex.z-dn.net/?f=%5Ceta%20%3D%20%5Cfrac%7B3%5C%20x%5C%2010%5E8%5C%20m%2Fs%7D%7B2.29%5C%20x%5C%2010%5E8%5C%20m%2Fs%7D%20%5C%5C)
<u>η = 1.31</u>