00:03
So here they have a question asking about which one of the following occurs with the rechargeable battery when it's recharged.
00:12
You got some answer choices here, and three of these are not right, and one is.
00:17
So basically, a is saying that the battery, which is run out of watts, has its wattage restored.
00:28
Well, wattage refers to power, which is equal to work divided by time.
00:41
And that's basically just energy over time.
00:47
Energy over time.
00:50
These are quantities that are a result of usually charge moving through a circuit.
01:02
Through other relationships, we can derive the amount of energy that a circuit contains when charge moves through it over time.
01:14
As far as replacing or running out of power, in other words, you don't really run out of it.
01:22
It's not something that gets used up.
01:24
It's something that exists or doesn't exist.
01:29
And it exists as a result of the movement of matter through a circuit.
01:36
The matter we're talking about is the movement of electrons.
01:40
This results from a movement of charge throughout a circuit.
02:01
So it's not that your power needs to be restored, or that wattage needs to be restored.
02:09
I guess that could sound like it's right, because in layman terms, we might say that, hey, we need our power restored to our house because it's out because of a storm or something.
02:19
But in the physics sense of the explanation, it does not make sense to say it that way, simply because it isn't something that you run out of and then fill back up or something like that or replace.
02:33
That's not how we think about power.
02:36
B is kind of the same way.
02:38
I mean, you don't run out of amps either.
02:40
They're either there or they're not.
02:42
And again, amps refers to current to a valid.
02:52
Of current and guess what that results from a movement of charge throughout a circuit so same reason i just said what with power you can't really restore that from a physics sense it's not something it runs out and fills back up current's the same way you don't run out of it and fill it back up either if you go to d chemical reactants in the battery will i mean that's just kind of silly because that would mean that every time we run out of uh you know run out of charge on our cell phone batteries, for example.
03:27
We don't go and find the chemical reactants that make up that battery and refill it.
03:34
It's not like you're, you know, you go to the gas station and put gas back in your car because it ran out.
03:39
That's not what we do with batteries.
03:41
We just simply, you know, when a battery goes bad permanently, that's because its chemical reactants are permanently done in terms of the reaction that they can carry out.
03:52
And you can't really reset that anymore.
03:56
By recharging, your battery is now aged to the point where it's just, it needs to be replaced.
04:06
So that's usually what we'll do at that point.
04:07
So d is wrong.
04:09
So process elimination off of this rationale is that c is the right answer.
04:13
The battery, the battery which is run out of charge, has charge returned to it...