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This is from a previous post I did: Now, if you have acceleration that is not constant, then when you integrate it you will have a "t" term in there already. So if a = 6t Then v = 3t2 + C This is Maths Ext 2 stuff. Now, if acceleration is constant, then you can do: a = (v-u)/t becasue...

Always remember this, the HSC does not determine the rest of your life, only the next year, perhaps. There are many paths to where you want to get. Some are fast track, some are longer term. Sometimes you have to work longer and harder but if you are determined you will get there. I just...

A car battery!!! Whoa! That would be hard to hand in. Did the Honda Civic go with it? I have to laugh. I saw the topic and had a flash back to Elec Eng at Uni. We were "playing with" (experimenting with) motors and were told to set it up and get the circuit checked before we turned it on...

For even n prove n3+2n is divisible by 12 Test for n=2 23+2 x 2 = 12 (which is divisible by 12) Assume true for n=k (where k is an even interger) Thus k3+2k = 12P (where P is an integer) Test k+2 (k+2)3 + 2(k+2) = k3 + 2k + 6k2 + 12k + 12 But k is an even interger. Thus k = 2m (where...

∫ √ ≥ * ≤ ∆ ∑ п ≈ ∞ If you are using Windows, just use the Character Map in the Accessories/System Tools. This font is Verdana. Many other fonts also have these "add-on" maths symbols. Hope that helps.

An inertial frame of reference is one that is travelling at a constant velocity or is at rest. A non-inertial from of reference is accelerating and the traveller is experiencing some sort of force. Now, get in your car (preferably with someone else driving). Take off your shoe (hold your nose)...

Fenris, I had to do that when I did Physics (when I did it). It is the easiest way to remember formulae. ;) Or, at least know that you have the right answer when you get it.

b) The sand falling at a certain rate... when they say rate, they mean the time is changing. SO... dV/dt = π/10 m3min-1 Now we also know that the height, h, of the pile is 3/2r h=3r/2 r = 2h/3 SO V = πr3 /2 V = 8πh3/27 We need to find dh/dt when h = 3m dh/dt = dh/dV x dV/dt dV/dh = 8πh2/9...

HARVIE Method?? Never heard of it, but the format for reporting an experiment should be something like this: Aim: Hypothesis/Theory: Method (including Apparatus and Diagrams) Results & Observations: Discussion: Conclusion: Here is another format that is quite good...

Yes. It all depends on how much action you put into the in between bit. You can do either and it all depends on your own "style" or "voice". Look at some different authors and see how they cope with it. Personally, I would structure your example as follows: "Time certainly flies, don't you...

OK, fair enough. It all depends on your interpretation of "just". Did the "just" mean, we "just now" put Newton in the driving seat, or did it mean we "have just" put Newton in the driving seat? Certainly, after the burn and with no more fuel left to change their trajectory or speed, Newton's...

They didn't want an answer that had nothing to do with the moon! :eek: Hey what?? So, what did Jim Lovell mean when he said, ‘We just put Isaac Newton in the driver’s seat. ? if not something to do with the gravity of the moon because a damn lot of what made it possible for them to get back was...

It is also interesting to note that should Apoloo 13 decided to stop, turn around and go back the way it came, the astronauts would have run out of oxygen. Newton's First Law states that a body will continue on the same direction at the same speed unless a force is applied to it to change. They...

Because velocity is two quantities - speed and direction. You may be able to emasure speed but in an instant do you really know the direction. To measure the direction you need some time to pass in order to assess the direction and then you are not measuring the instantaneous speed. (Sounds a...

This is the equation for working out the spring force constant. (Hooke's Law) <table border="0" align="center" cellpadding="0" cellspacing="0"> <tbody><tr><td>F_x</td> <td> = </td> <td>force</td> </tr> <tr> <td>k</td> <td> = </td> <td>spring force constant</td> </tr> <tr>...

I guess one thing to do, then, is start looking at Studies of Religion as another history subject. Part of studying Religions like is knowing the history of their formation. It seems to me that some of the course work is about using the information you are given and using that in a new format...

Yes, you can differentiate and get v = u + at This is one of the simple formulae just given when doing motion in physics. OR in another guise. a = (v-u)/t (which is essentially average acceleration = change in velocity over time - oh look: a = dv/dt *snigger*) The little y thingies are left...

But on the calculus, if you know how to use it, you certainly can use it in Physics. It is not wrong to do so. Knowing that... In a vertical direction acceleration is always: ay = -g (due to gravity and downwards) Integrate this to get velocity: since ay = dvy/dt = -g vy = -gt +CONSTANT...

Hi Alez, there is a very simple way to think about Perms and Combs. You want to make 3 digit numbers. So you have three boxes to fill. I like to think concrete on this one because it makes it easy to see. The three boxes are digits box, tens box and hundreds box. You have 5 different numbers...

Depends on what the teacher says your faults are? Can you perhaps point me in the right direction and I might be able to give you a hand working out what it is you need to do to fix them. Hope I can help.