Answer:
(a) Current will be 
(b) Number of ions will be 
Explanation:
We have given that resistance of the biological cell 
(a) We have given potential difference of 75 mV
So 
From ohm's law we know that current is given by
(b) We have given time t = 0.74 sec
We have to find the charge
We know that charge is given by Q = it, here i is current and t is time
So charge will be 
So number of ions will be 
Answer:
because pennies are made from copper
Explanation:
Answer:
the ans is D... good luck
The answer is B) wavelength
Answer:
When white light shines on the bubble, it acts as a prism. While some of the white light bounces back off, some of them pass through the prism forming fringes of colors. But then, they too bounce off the inner part of the film. So one set of light rays shine into a soap bubble, but two sets of rays come back out again. When they emerge, the waves that bounce off the inner film have traveled a tiny bit further than the waves that bounced off the outer film. So, we have two sets of light waves. After that, the waves starts merging (Just like the ripples in the pond) . Some add together while some cancel out. That is why we see the pattern of colors repeating in the thin film soap.
