Recent content by AmirWG

potential difference will be the same across the 20 ohm resistor i guess ?

@berkeman @kuruman will the circuit still be shorted if the circuit looks something like this ?

kuruman but if follow the electric current starting at postive terminal , electric current will flow in both top and bottom branches after the junction right ?

i was trying to calculate equivalent resistance of this circuit and that was my attempt : 1) i can see two parallel 20 ohm resistors so equivalent resistance = $${20 \over 2} = 10 ohm$$ 2) now we are left with 20 ohm resistor and 10 ohm resistor which are connected in series so equivalent...

i can now see why my steps went wrong and i am even able to get the correct answer now , thanks a lot for helping (:

i had a problem in my textbook asking me to get equivalent resistance of a circuit , i ended up getting 23.7 ohm as my answer but my textbook says that the correct answer is 100 ohm you can see my attempt here : imgur link : i really want to know what went wrong with my steps thanks in advance

so the pressure at point A is less than pressure at point B because the height at point B is greater than the height at point A ? right ?

the only thing given is that the fluid in yellow is oil while the one in blue is water.

my text box says that the pressure at point A is less than pressure at point B Are not they supposed to have same pressure as they are on the same horizontal plane ?

if we use a water manometer we get the pressure of the gas in manometer by using this forumla : Pgas = Patmosphere ± ρgh and if we use the a mercury manometer we use this formula instead : Pgas = Patmosphere ± h and here's my question : why cannot we use the first formula in both of them ...

got it , thanks for your time.

@kuruman @sophiecentaur i am talking about this : and this ( this is just an example of what i am saying btw) what does he mean by that ? if we use u shaped tube with two branches with different diameters realistically we should get totally difference results as the branche with smaller...

Why the height of liquid is not affected by the radius of U-Shaped tube . ..my textbook says this and it does make sense because if increase the radius of u shaped tube the height of liquid should decrease as the liquids take shape of their container. Edit : I could not make the title longer...

When I should use each one of these forumlas ? I just need someone to explain each one of them ... Here's a pic to what I am referring to https://ibb.co/M1GJRPF , why cannot we always use the big F in the middle , the question might be lame but I just suck when it comes to dealing with...