Recent content by ephphatha16

Yeah true Fcos θ + Nsin φ = mg F sin θ = N cos φ But I don't know what values to plug in ... is the first equation about vertical component and the second equation about horizontal component?

1. Find the value of tan φ to 2 sf where φ is angle made by line of action of reaction force at hinge above horizontal. https://isaacphysics.org/questions/trapdoor_num Part B Angle of reaction forceHomework Equations Mass of uniform trapdoor: m=4.0kgm=4.0kgThe trapdoor is held open making an...

Homework Statement [/B] I was searching for a secondary source on investigating the effect of temperature on membrane permeability of beetroot and i need the d.v. values in transmission%. But I am getting the dv values in Hunter (‘L’ (lightness), ‘a’ (redness and greenness) and ‘b’ (yellowness...

Monochromatic light has single wavelength while in white light, there's mixture of wavelengths from 400nm-630nm. So I suppose this will help me to measure the distance between the fringes more accurately as the fringes only correspond to one specific wavelength? Also I have another doubt...

1. What is the advantage of using class 2 laser light? I would really appreciate if reference source is also given!Homework Equations Not needed.[/B]The Attempt at a Solution Well, I thought that using monochromatic light would made it easier to measure the distance between fringes. And also...

Thanks a lot for all the beneficial input regarding the topic!:biggrin::biggrin:

Thank y'all for your wonderful support and help!:biggrin::biggrin::biggrin: I will try to change my values...i suppose...:confused:

Thanks! The reason why I wanted to obtain this value is because I was doing an experiment for I-V characteristics of filament bulb. The maximum resistance of the filament during experiment was 9.46ohms. Now, if the actual value was 1.7 ohms at rtp, then there would be a huge percentage...

No I didnt forget... I wasnt sure that if cold resistance meant at 300 K (20C)(room temperature) Is it?Really grateful for your help!

P =( V^2)/R R = (2.5^2)/0.25 = 25ohms but i don't know whether it is the resistance at 20C / 300K or room temperature...

Ok... so then if I have a 2.5V bulb of 0.25W at 300K how could i find the resistance?

Thanks a lot for the values!:smile: rtp: room temperature pressure

Thanks a lot for the data! However these are values for resistivity I couldn't use them for resistance, could I?

I was looking for any credible sources who could reveal the resistance of a normal tungsten filament bulb at room temp 20 C? I heard its cold resistance is about 9.5ohms. Is that the resistance at rtp? Thanks a lot in advance!

Hi y'all! I'm Eph. I am currently doing my a levels in Physics and I'm in my 1st year. I've joined here in order to feel the spark of physics. So that my learning becomes an adventure rather than a difficulty. Thank y'all for being here as a community to support and inculcate the true love of...