question Definition and 25 Threads

since euler's identity states e^pi*i+-1 is it okay to write down e^pi*= e * -1/e = -1 and would for integers the same rule apply where a^pi*i= a * -1/a = -1 or is it only for the constant e? this might be a stupid question, but i cant find an answer and im curious

Where can I ask financial math question in this forum?

I had a question in my mind about PCBs. Printed Circuit Board (PCB) is a non-conductive material with conductive lines printed or etched. Electronic components are mounted on the board and the traces connect the components together to form a working circuit or assembly. Now a Pencil has...

[Thread moved from the technical forums to the schoolwork forums] Let's suppose we have a ring with radias R and radius of the cross section r. We start rotating with an angular velosity w. We will there be an induced EMF in the ring and how can i find it's value?

Hi! I have a loss head question. There is a difficulty in understanding the hydrodynamic loss head concept. Assuming that there is a one-sided tube with incompressibility, visibility, tube friction coefficient and cross-sectional area A.. There is friction in the loss head formula, but is the...

what is the problem ? if want ask a Q alkl i get is enter some thread

The question and my attempt at a solution are attached. Thanks.

The Q My "working" The answer is simply 2820 N

I have attached a screenshot of my rough work. First of all, is my interpretation of the question correct? Please see the diagram in purple. To me, this makes sense because a=v^2/r is the only equation from my coursework that seems to relates radius (which you can find from the length of the...

The question What I did The answer

The Question What I did The Answer

Will post a question and view responses

Question: My answer: The books answer:

Hello esteemed members, Recently I have been using this site for getting help, and I have found it very helpful, thanks to the helpful members who I may not be able to thank them fully. However, part of my method of studying is to do a self-contained study guide or summary or notes... to the...

consider a giant planet have a 3/4 mass of it sun and with the distance of 50AU from the sun. does the planet revolve around in a elliptical orbit because the mass of the planet is high so there barycenter is half the distance between them so it look like binary star system but the question is...

s1=-u1^2/2a1 s2=-u2^2/2a2 s2>s1+d (If distance the car stops is bigger than the distance the lorry stops plus the initial distance then they will crash) (sub s1 and s2 in) -u2^2/2a2 > -u1^2/2a1+d Switch 2a2 with whole left side of equation. -u2^2/(-u1^2/2a1)+d > 2a2 Make the (d)a fraction by...

I don't understand what the question means, and the answer is provided here: https://physics.stackexchange.com/a/35821/222321 Could someone provide a comprehensive one-by-one explanation.

I tried to construct a diagram, but to no avail, since I don't really understand the qn. However, my professor provided me with this graphical depiction (that i obviously don't understand)

Hi. I have a problem I'm trying to solve. I have a tarp that is stretched horizontally across two walls. The walls are 5.5m apart and 50m long. There is a pressure of 10mBar above the tarp pushing it down, making it sag about 0.15m in the center. I'm trying to calculate the force with which the...

What I did was split the problem into two seperate summations based on x & y coordinates: Tcos(25) - Tcos(55) - Px = 0 Tsin(25+Tsin(55) +Py - Q = 0, Where Q = 1860 I initially got an answer of 2391N, but it keeps marking me wrong for said answer. This is the free body diagram, (the previous...

(mentor note: moved from Classical Physics forum hence no template) Hello, I am having trouble with this question: Imagine in real life there was a coefficient of kinetic friction of 0.4 between the plastic wheels of the cart and the wooden ramp. If there is only friction on the flat part of...

I need to understand the mechanics involved in performing a wheelie. That includes analyzing the free-body diagram. And considering all the factors involved in performing this manoeuvre in motorbilkes.

Hardly anyone would think of this solution. I even wonder how anyone would come up with the question. And it is even more amazing that the questioner and solver were not the same person.

Mixing bleach(clear) and nailpolish remover(green) makes orange product at first but after a few minutes of stirring turns to a pale hello color. What is happening in this reaction (is it the bleach and acetone or also father ingredients in nailpolish remover) and did I just make chloroform...