Recent content by Alkhimey

Hi, I need to make a demonstration that shows that white light is composed of different colors. I do not have a prism, and will not be able to obtain one in time. I have a white LED flash light, and I tried some improvisations with different objects (bottles, glasses etc), but none seems to...

Hi, I am fresh undergrad student. I have decided to handle all my homework in a printed form, this saves time and allows me to correct stupid mistakes without the need to re write whole pages. I have tried several solutions, but none suits me best: Open Office's math is too slow and as...

I hope this is a correct section. I have a function that looks like this: y = a1*x1*a2*x2*a3*x3...an*xn All the parameters of the polynom (a1, a2, a3, ... an) are unknown. Is there a way to find them using a small-medium (less than n) set of examples where each example is a set of xs...

Yes I understand. But there is olso the gravity force you need beat. The gasses must get out of the rocket with force greater then mg. I made a drawing to illustrate it. (btw what is the letter for pressure force) pressure=(-pressure) (action reaction) -pressure is the reaction of the...

Thank you for your reply. But how is enough pressure generated to make the rocket fly? In my opinion the gasses leave the rocket tank the moment they are created, so there is no pressure concentration.

Can somone explain me how solid fuel rockets works? Where should I start the reaction, at the tail or at the head? What fuel is the best?

Maybe you are right. But we add D'lambert force to calculations that don't look logical to us. We even don't know why are we (I at least) doing it. D'lambert force don't exist to someone that is standing out of the system, but when we stand inside the system the force appears real as gravity...

No they don't feel this force, but they feel the effects of it. After all, they don't fall out of the orbit. They can't feel gravity becouse the resultant force is 0.

Step by step drawing Draw the Y axis and the X axis find the point (27, 0) Draw a line between (0,0) and (27,0) Draw half a circle with this line as diameter. Draw the speed: The speed is a vector tangent to the circle at (0,0). The angle \alpha between the speed and the X axis is the...

First of all make a draw. Than ankyze each dimension seperatly. Do it in a table with x and y in the header. Here is an example of the beginging of the table. _X______|_____Y__ V=const.| V=V_0+at a=0 |a=-g . |. . |. . |. After you do so, find in the the...

My English is really bad. Does D'lambert force excist in our everyday reality or it is something theoretical that excist only in the "papers"? Hope all mistakes are correct now.

You misunderstood my question. Does D'lambert force is a force tha excist in our everyday reality or it is something theoretical that excist only on the "papers"? For example, the gravity force is real. I can sense it, I can feel it, I can see the affects of it.

10*1.02=12 1/2*-9.8*1.02^2=5.09 Therefore: X=12-5.09

Does Dambler (hope I spelled it right) fore is a real force or just something we use to explain things that we can't explain in other ways?

It is better to write clean, nice and exact calculations. In some places they take off points in an exam if you don't do so . It aslo better to slove the question step by step and in a general form and insert numbers only at the final stage. Here is how I would slove this question: a. 0)...