Joatmon

I remember being jealous of my younger brother because he was given a "Mickey Mouse" gas mask whereas mine was very similar to the adult model

The older you get the quicker time passes which isn't fair when you think about it.

Spend a penny

I have a suspicion that the expression "keep you pecker up" has a different meaning each side of the Atlantic. http://www.phrases.o...ngs/217400.html

I wonder if he got the idea from the solar light tube, or whether he just thought of it :- http://www.ezroof.co.uk/acatalog/Sola_Tubes.html?gclid=CNu575G6h68CFUcntAodlBLi8g

Perhaps younger people don't understand what Cc stands for when they write(if pressing keys is writing) e-mails?

Just for something to do I thought I might have a go the "technicians" way.( find Z, Find I, Find Xc etc. backed up by a phasor diag,) Might be interesting to compare my answer. To be absolutely clear - you should state in what form you want Vc (presumably V p to p)? This would be one way to check your answer.

I would like to join with some of the others in saying this:- If I go to my profile and notice a change in my points it would be nice to easily find which post caused the change. It would just be nice to see what had pleased or offended someone. The "name" of the person would not matter.

Starting with "1". As you obviously know, the rule is like charges repel, unlike charges attract. The arrows are not directions of force. They represent the direction that "conventional current" would flow when driven by a voltage difference across a component. In the history of this assumption it wasn't known which direction the mysterious current went. A convention was made that whatever it was it would flow from positive to negative. Later, it was found that electric current was a flow of electrons that, in fact went in the other direction! So electron flow is from negative to positive! Later still it was realised that "holes" (places where electrons could fit as they travel) move in the direction of conventional current. These "holes" are known as positive charge carriers. So conventional current and positive charge carriers move from positive to negative. Electrons flow from negative to positive. Looking at "2". If you have a filament lamp rated at 240V 60W it will provide (or take from the supply) 60W of power if connected to a 240V supply. If you increase the voltage you will also increase the current so the power will increase. Assuming the resistance of the lamp doesn't change doubling the voltage will increase the power four times. Because the lamp will be much hotter the resistance will change to some extent, but this is usually ignored in basic calculations. Halving the applied voltage will result in using a quarter of the power by the same argument. By Ohm's law the current through a fixed resistance (such as your lamp) is proportional to the applied voltage (other factors such as temperature remaining constant). Looking at "3". The total resistance of the circuit is the sum of the resistance of the lamp (which is usually assumed to remain constant) plus the resistance of the rheostat. Rt=R1+R2. Thus if you reduce the resistance of the rheostat you will reduce the total resistance of the circuit. The current around the circuit will increase. The power given to the lamp will increase P=(I^2)*R( R=resistance of lamp). The lamp will glow more brightly. The voltage across the lamp will increase. V=I*R (resistance of lamp). There is another way of determining the voltages across lamp and rheostat known as the voltage divider principle. The voltages across each will be in proportion to their resistances and add to give the supply voltage.

The music's good too!

Just being fair to you and the rest of the forum!

Seems some of you need a good laugh

Seems to be some misery around - might as well join in!

To satisfy the questioner.

Perhaps when he travels 3 seconds into the past he is exactly where he was 3 seconds ago and is 3 seconds younger. Perhaps there is only one of him, and that one has not yet arrived 3 seconds into the future and doesn't yet know what he is going to do after 3 seconds pass.

There is always the possibility of cremation. This can generate useful heat. Recently the question of using the heat to raise the temperature of swimming pools has been mooted. With a plentiful supply of "fuel" I see no reason why factories and power stations could not run on dead bodies! :- http://www.guardian.co.uk/environment/2011/jan/24/crematorium-heat-swimming-pool-redditch

I like to smell unscented rose And see castles in the air. See pictures in a flickering fire, But must accept they are not there

I don't know what you are on, Xittenn, but I'll have some of the same!

You're twenty years younger than me - methinks we are looking at different ends!

Except for the fact that I learned electromotive force as : e.m.f. = Potential Difference(Volt) + Drop in potential difference due to internal resistance(Resistance in the battery) so basically, even though both things are the same, the textbook claim that "voltage is e.m.f., but e.m.f. is not voltage" Not quite. In simple calculations the battery is usually assumed to have no internal resistance. In this case the terminal voltage is a measurement of emf, the force that drives the current around the circuit. When looking at the situation more closely you take the internal resistance of the battery into account. This means that, unless the battery is not supplying current, what you measure at the battery terminals is the battery emf minus volt drop(pd) across the internal resistance. In other words you include the battery internal resistance as one of the resistors in the circuit.

Thought I'd seen this before - same question and answer in "Which way is out". Edit:- Just checked again, very similar but not quite the same!

But not look too hard for the end!

I find your use of "thy" somewhat jarring as they don't seem to me correct. Examples:- line 4, it seems to me, should use" thee" or "thou" and line 10 "Thou" ?