Recent content by ft92

can anyone please explain to me why it's not possible to determine accurately the position of a centre of a Newton's ring pattern? I know that in a Newton's ring only the distance between one side of the ring to the other i.e. the diameter can be accurately determined, not the distance from the...

Homework Statement t has been proposed that a spaceship might be propelled in the solar system by radiation pressure, using a large sail made of foil. Assume that the mass of the ship + sail is 1780.4 kg, that the sail is perfectly reflecting, and that the sail is oriented perpendicular to the...

Thank you for your answer, but actually I'm only asked to find the number of turns without researching the properties of the material.

Homework Statement Suppose that you want to design a solenoid to control magnetically the central locking system of your car doors. This needs a magnetic induction at the end of the coil of 0.161 T. To be compact enough to fit next to the window winder mechanism, the coil can be only 3.03 cm...

actually without the minus sign because I'm asked for the magnitude only

Thanks for your reply! Ok, if I use for the charge of the electron -1.602 x 10-19 i get : 1.3 x 10-15/ -1.602 x 10-19= -8.11x 10-3 N/C correct?

Homework Statement Two large, parallel, conducting plates are 7.5 cm apart and have charges of equal magnitude and opposite sign on their facing surfaces. An electrostatic force of 1.3 × 10-15 N acts on an electron placed anywhere between the two plates. (Neglect fringing.) Find the magnitude...

thank you everybody but my draw was correct eventually :) It was just an online exercise where I had to drag and drop the capacitors and voltmeter in the right place.

no, there are no resistor. that are all the instructions I have.

Homework Statement Wire up a circuit with C3 in parallel with C1 and C2 in series. You will need to measure the current arriving at the capacitors (before they are fully charged) and the voltage across capacitor C2. The Attempt at a Solution I'm not sure if I'm measuring the current before...

thank you!

Homework Statement Find the magnitude of an electric field intensity at a distance 12.9 cm, from the axis of a long, straight conductor, which has a radius 3.82 cm, and a charge density of 1.61 C/m. Homework Equations Gauss's law The Attempt at a Solution E= λ/2πrε0 Hello, I'm having some...

Hello everyone! I would like to share with you the results of an experiment we did in the first year physics lab and ask for your point of view to understand why we got the results that I'm about to tell you. The experiment was nothing too fancy, we were trying to test how well materials...

Homework Statement An otherwise free metal rod of length L = 67-cm is clamped at a point L/18 from one end. A standing wave is set up on the rod. What is its longest possible wavelength? The Attempt at a Solution where do I go wrong? thanks

yes it's 3/5 of the initial speed