QCE Stuff > QCE Physics
QCE Physics Questions Thread
Bri MT:
--- Quote from: A.Rose on April 29, 2020, 08:01:18 pm ---Thank you both for your help! Yes, I did work out that I needed the mass to calculate the force eventually. :)
I definitely need to do some thorough electrostatics revision! :D
Thanks!!
--- End quote ---
No worries!
This stuff is pretty standard across states so if you want more revision you should be able to find a bunch from other states.
A.Rose:
Hi! Me again with another question! ;D
I am very confused about this question. (The diagram is attached). The question is to 'explain using physics concepts how the system will operate to close and open the tubing'.
A student designs a simple solenoid valve system to control the flow of a liquid through flexible tubing by closing and opening the tubing. It is comprised of an iron rod with a spring coiled around it at one end. One end of the spring is attached at one end of the rod and its other end is attached to a rectangular housing. The tubing is fixed to a solid support.
If you could at least direct me to where I can find a good explanation of how these kinds of experiments work because I don't remember learning about solenoids in this kind of context last year. I'm assuming its something to do with the establishment of a magnetic field that opens or closes the tube - but I am not confident. Just some clue or somewhere I can research this (I didn't have much luck in my textbook or searching online) that would be amazing!!
Thank you!
Bri MT:
--- Quote from: A.Rose on April 30, 2020, 12:56:38 pm ---Hi! Me again with another question! ;D
I am very confused about this question. (The diagram is attached). The question is to 'explain using physics concepts how the system will operate to close and open the tubing'.
A student designs a simple solenoid valve system to control the flow of a liquid through flexible tubing by closing and opening the tubing. It is comprised of an iron rod with a spring coiled around it at one end. One end of the spring is attached at one end of the rod and its other end is attached to a rectangular housing. The tubing is fixed to a solid support.
If you could at least direct me to where I can find a good explanation of how these kinds of experiments work because I don't remember learning about solenoids in this kind of context last year. I'm assuming its something to do with the establishment of a magnetic field that opens or closes the tube - but I am not confident. Just some clue or somewhere I can research this (I didn't have much luck in my textbook or searching online) that would be amazing!!
Thank you!
--- End quote ---
Hey!
You're on the right track! Current carrying solenoids create magnetic fields like the field around bar magnets.
This exact question type isn't common but there are often questions involving magnetic fields around solenoids in VCE physics so it might be worth looking at some of those.
I'm aware I've been pretty vague here (you seemed to be on the right track) - please feel free to follow up with anything you're unsure of :)
elmobluey:
Hi!
I'm confused on the working that my teacher has provided on a recent practise data test we did.
I have attached the dataset and the question. I really don't have a clue on what my teacher has done. I thought I would have seen "9.81m/s/s" somewhere in the working. But... Yeah I really have no idea what's going on here. Can anyone explain to me why the acceleration due to gravity is 12.5m/s/s?
Thank you!
Bri MT:
--- Quote from: elmobluey on May 02, 2020, 10:33:41 pm ---Hi!
I'm confused on the working that my teacher has provided on a recent practise data test we did.
I have attached the dataset and the question. I really don't have a clue on what my teacher has done. I thought I would have seen "9.81m/s/s" somewhere in the working. But... Yeah I really have no idea what's going on here. Can anyone explain to me why the acceleration due to gravity is 12.5m/s/s?
Thank you!
--- End quote ---
Hey!
This is a question saying if the data we had was x, then what would that mean about y? Sometimes this will end in a reasonable value and sometimes it won't. The reason you don't see the actual value for g is because the question wants you to pretend you don't know what this is & figure out what it would be for the provided fake situation.
Do you understand where g = sin(theta) comes from?
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