Assuming that the field direction is along the axis of the coil (not defined in the question as stated here*), there will be a potential generated in the coil. This is exactly what happens in isolation transformers. The current depends on how the coil is connected.
*My assumption is that the...
It's easy enough to turn this into an explicit formula for each iteration.
And easy enough to write a programme or set up a spreadsheet to do the iterations.
I doubt that there is a closed-form formula for train distance versus number of trips (other than one that merely embeds the...
If you wish to iterate, you need to define a cycle that starts from the same place each time - for example the bird arriving back at the platform.
In this case, t'2 = 2*t2 - 1
Then each iterative step is finding the value of t(n+1) in:
a*t(n+1)^2/2 = 100*(t(n+1)-t'n)
and setting
t'(n+1) =...
I suspect that you are overcomplicating?
Working backwards, I take it that touching once is the touch when the train is at the platform? Using the numbers backwards we have:
Train starts from platform: Dtrain=0 at t=0, so (D in km, t in hours)
Dtrain = a*t^2/2, where t is the time in hours...
That's a very different (and much simpler) problem than the one posed here. The bird flies for 40 hours, fo it flies 4,000-km. And it makes an infinite number of ever-shorter round trips.
This does not appear to be a normal "homework question". It looks like the result of an attempt to "add just a litle difficulty" to a question. However, in this case it seems to me that this "little extra difficuly" transforms the question from one which has a closed-form solution to one...
Hi You are correct - the answer should be the boiling point of nitrogen. I had not appreciated that the -210degC was supposed to be the correct answer.
Now I know this, my interpretation (for what it is worth) is that it wasn't just your son who misread the table then it was split between...
The "clue" is in the meaning of "as it leaves the ground":
This statement implies two things:
Its starting height is zero, and
Any force the ground exerts on it lasts for no time after that moment: so the effect on speed will be nil.
There are approximations implied in the question which could...
Q4a The information given in the text is incorrect: the boiling point is correct (though I'm not certain I would use that term), but CO2 the triple point (the lowest melting point of CO2) is about -57 degC. So I doubt that the school expects the fully correct answer - below:
The CO2 will...
Agreed - albeit it does depends on the field of work.
Neverthelss, the only EM waves I personally have not seen referrenced as "light" are coherent radio frequency emissions below 100-MHz - presumably because there is no known significant source* of these that originally arose from electronic...
I'll limit myself to physics:
It depends on the context and on who is talking. In astronomy, EM radiation can leave its source as viviable light and arrive on Earth as infra-red or even radio waves. Simlarly, radiation can start as x-rays and arrive here as visible light. This makes the...
False assumptions make life very difficult. To mininise complexity, I will only describe relationships with gas, pressure and temperature remaining constant.
First, let us look at how the energy is stored instantaneously: it transfers between the pressure and the bulk velocity, with the...