Recent content by justwild

I don't understand. Even if I assume a spherical coordinates system why would there be a component of acceleration in the ##\hat{\theta}## direction? Isn't ##\theta## supposed to remain constant during the motion?

Homework Statement Finding the time period of a conical pendulum by D'Alembert's principle. The string is of a constant length and all dissipations are to be ignored. Homework Equations The time period of a conical pendulum is 2\pi \sqrt{\frac{r}{g\tan\theta}}. I need to arrive at this result...

So, I will get the answer as ##f_x##. It's right. But I didn't understand why. Can you give me a reference? I would like to read more on this.

Homework Statement A function f(x,t) depends on position x and time t independent variables. And if \dot{f} represents \frac{df(x,t)}{dt} and \dot{x} represents \frac{dx}{dt}, then find the value of \frac{\partial\dot{f}}{\partial\dot{x}}. Homework Equations The Attempt at...

I too don't find any of the fours suitable for naming the test of alcohol. Well burning sensation can only be the proper explanation.

Well I did some readings on transformers, particularly single-phase transformer, and found that there exists central tapping that let's us access two different voltages. The central tapping, as understood by me, is what we call neutral (the current return path-as we call it here). Then I...

To where?

But this definition is looking equivalent to the ground. If you are correct, then what's the difference between ground and neutral?

All I have read in the electricity class is that AC is any type of current which actually reverses its directions periodically. I have also read all sorts of mathematical expressions concerning sine-wave form of AC. I have also understood how AC generator works. These topics had never bothered...

Homework Statement How should I find the time period of a pendulum which is made up of a rod of length l fitted with a bob of radius r at its one end and the other end being pivoted to the wall? 2. The attempt at a solution Actually having problem with calculating...

well If I do that I shall be returning to the same problem statement...

Homework Statement Given that x^{2}f(x)+f(\frac{1}{x})=0, then evaluate \int^{1.5}_{0.6}f(x)dx Homework Equations The Attempt at a Solution tried to replace f(x) using the provided equation...didn't help

[SIZE="3"]Is there any formula which gives the combinations for n things (taken r at a time, r being less than n) which are NOT ALL different? Say you have a total of n things and in those n things you have p things identical. Then you are required to select r things (r may be less or greater...

If the masses have been kept apart at an environment such that no other physical interaction except the mutual gravitational interaction between the masses exists...then...it follows that the masses are having a finite potential energy...And this potential energy is the source of kinetic...

I am not...I am just thinking how vulnerable the system is...