Recent content by Diegor

The instant power delivered by the source to the rest of the circuit is iv being i and v the instant current and instant voltage If you consider that i and v are sin functions and you do the product you will find the three expressions for power related to an AC voltage source. Active power...

Hi james123. Maybe you should go back to really basic cicuit examples like two different resistors in series or two resistors in parallel and try to understand how KVL, KCl and Ohms law work there to get a better understanding before you jump to a more complex situation.

Yes to the first question. Your resistor will work with less power than it can stand. But the same happens in an electrical oven whe you regulate temperature to less than the maximun. Maybe you will have to check also if with that % of power the temperature will reach the right value. To the...

Do you want to connect a heating resistor to a solar panel? The power rated for the panel is the power it can deliver. The power rated for a heating resistor is the power it can dissipate without being damaged. So the 400w resistor will deliver 140w of heat because that is the power from the...

Try to define de displacement of point B as a function of de alngle theta. You can define vectors from origin O to help you.

Check integration by parts. You will see that f.ds is not the same as df.s but there is a relation between them. That is math. then you will have to see if that has physical sense.

Yes you are correct, that is the assumption!

Potential [emoji5] sorry. And kinetic should be diferent also so mechanical energy is the same.

The energy in A is different to the energy on E since E is at a lower height. It should mean that the car gained some kinetic energy at E. I think the statement is wrong because if the car has the same speed on both points, it should have same kinetic energy that also means same height in a...

At a first glance I see some equation problems since D is not equal to E D=epsilonxE. On the other side the elctric field outside the plates is considered to be 0 since the infinite parallel plates asumption is used when Gauss Law is applied. You should check your relevant equations

That force, in which body is acting? Are they components or your equatin is a vector equation. Try to explain your approach in words so we can help you.

Your H is negative if b is big enough but that would mean that the damping is so big that the system won't have any resonant frecuency because there is no chance that it naturally oscilates( it means With F=0)

I think you are correct. To get the partial derivative of x with respect to x prime you need x as a function x prime. And that is the coordinate transformation you mentioned. Probably in you problem or examples the tensor component is already given in one coordinaye system.

Ok in your diagram I see 1N as normal force is that the result from 1kg x9,8 m/s2? If both forces tension and friction are in the same direction would it be possible for the block to stay in equilibrium?

Where is the figure that is mentioned in the statement? Anyway the normal force mg is not correctly calculated. You should check the direction of the forces think in your block where is it pulled from?