Recent content by John421

I've been doing this for as long as I can remember, and I've never been told off for doing it until now. However, I have recently been informed by someone that what I'm doing is vague and doesn't properly communicate what is mine and what is being taken from the source. I'm forced to use the...

In the context of cellular respiration though - I think the H+ ion follows the NADH around when the NADH moves physically. I was wondering what type of bond this would be called.

First of all: I keep finding two equations that are supposedly showing the same reaction: 1) NAD+ +2e +H+ -> NADH 2) NAD+ +2e +2H+ -> NADH +H+ The first one suggests NAD carries around 2 electrons and one hydrogen ion The second one suggests NAD carries around 2 electrons and 2 hydrogen ions I...

But then why does the formula say cross-sectional area instead of surface area?

Let's say we have the problem: A 100W lamp emits light in all directions. Assuming that the lamp is a point source, calculate the intensity of the radiation 1m away from the lamp. The surface area of a sphere is :4*Pi*r2 intensity = power/cross-sectional area The answer is intensity = 100w/4Pi...

I'm attempting to work out when to use the different formulas and how everything fits together, can you confirm if the following is correct? 1) If we had the problem: There are 250 dogs at a dog show who weigh an average of 12 pounds, with a standard deviation of 8 pounds. If 1 dog is chosen at...

The issue is that if R2 represents anything you put in the Vout terminals, the above diagram wouldn't make any sense

I've played around with different combinations of numbers, and the formula only seems to get close if R3 (the component at Vout) has a resistance that is much higher than that of R1. It doesn't seem to matter if R2 is high or low as long as R3>>>R1 So would it be correct to say that R1 is...

I believe that the formula Vout = Vin * R2/(R1+R2) is used to calculate how much voltage whatever is connected to Vout will be receiving. So if: Vin = 12V R1 = 10 ohms R2 = 5 ohms Then Vout should be getting 4 volts But if we then connect an appliance with a resistance of 2 ohms to Vout...

I learned it in A level physics I was taught that one end of the battery is slightly positive, and one end is slightly negative - causing electrons to flow from - to +. I was taught that when you add a supply of electrons (like a battery) and complete the circuit, the electrons gain kinetic...

Is my understanding of how the voltmeter works correct at least?

I read that a voltmeter measures the voltage difference between two points, but this doesn't make much sense to me. Let's take the following picture: http://www.bbc.co.uk/staticarchive/346c39cfd7376d612ba49cad06febd926fe7b9f6.gif Would it make sense if the voltmeter was receiving current from...