Usually, but for this he probs put it on y axis to make finding the speed easier (otherwise he'd have to find double the reciprocal of the gradient, not hard but unecessary lol). In an exam tho yeah probs safer to do what u said
Hi, thanks for the helpful explanation. Just wanted to ask, how exactly do you know where the fundamental frequency is? Because the wave basically looks the same for me within a range of about 4-5 hz (I'm using guitar strings). Any answer would be appreciated, thank you!
Um hoping you'll see this in the morning before the exam but its the largest amplitude of the shape of that first harmonic that you take, I reckon you can also take a mean.
Tip: place a tray full of sand directly below the masses, and keep distance. I think the sand tray has something to do with absorbing the impact when the masses fall to the ground. Not entirely sure though.
An easier method is to use a safety mat (basically a square piece of foam). Place it under the masses and its way easier than getting enough sand for all the students.
Hi, sorry if this is a bit off topic but do you know of any way for someone studying independently at home can do the practical endorsement? I'm doing A level physics and maths (AS level at the moment) on my own time without a course since I can't really justify the expense of two distance a level courses (though I may be able to stretch to the fee for their written exams), but this practical endorsement is confusing. I keep seeing places online mention that it can be done, but none seem willing to talk about how, whether because they want you to pay for the full course first, or because it requires the full course full stop I don't know. oh and do you know of any reliable online retailers where I can buy equipment for these practical things? They look fun so I can justify that expense, but buying things like data loggers and such is new territory :\ Thanks.
Could you contact your local college or sixth form to see if they could help out? I guess the alternative is you just turn up at a centre to sit the exam - but don't have the practical endorsement on your final certificate. Certainly a lot cheaper than buying all the equipment needed.
A Level Physics Online I've given that a go. The only place that is really any good for that for adults where I live is Lincoln college , and they basically flat out told me that to do the endorsement with them I'd have to sign up for the full course. They've never been the most flexible lot.
As someone in the same situation, I struggled with the problem for over a year, but eventually I came across a neat solution. Pembrokeshire college run biology, physics and chemistry practical endorsements for people in independent study. For each subject there's a 4-5 day workshop in the spring of your A2 year, (covering both AS and A2) so you'll need to arrange some accommodation to stay over in Pembrokeshire, but you won't have to worry about it until next spring. Most science courses at uni require the practical pass mark, so it's well worth doing if that's your goal. It's a very friendly and professional environment. I went to the edexcel biology workshop in Feb and I'm going to the AQA physics this week. The people doing the course have travelled from all over the UK, so you won't be alone. I would definitely recommend doing this next year, as it's also a great way to learn all the practical knowledge you need for the written exams, and you won't need to buy any of the equipment or have any prior knowledge of lab work. :) Good luck, either way!
the mass per unit length is the gradient of a straight line graph where frequency squared is plotted over tension (f^2/T). Tension is equal to the mass multiplied by gravitational field strength (T=mg)
at 3:56 u make a slight error with your words. you say wavelength is equal to 2 lamda instead of L
This is such a helpful video, thank you
Sir, at 2:48 what were you trying to find from the experiment? Because I didn’t understand the graph part
I believe he was trying to find wave speed (c).
AQA use the Greek letter mu for mass per unit length, which I personally think is clearer than using m, which would usually just mean mass.
British teaching at its very best!
3:57 *length
Should length not go on the x axis since it is the independent variable?
Usually, but for this he probs put it on y axis to make finding the speed easier (otherwise he'd have to find double the reciprocal of the gradient, not hard but unecessary lol). In an exam tho yeah probs safer to do what u said
Where do you get readings for tension from
Hussein Jusab The tension in the string is equal to the weight added to the end of the string.
To figure out the tension you do the mass (which would be changing if you're varying tension) times the gravitational field strength (9.8N/kg)
Mass multiplied by gravity 10, also pi is 5
Physics Online so if the mass increase on the end, the tension increase?
@@JD_922 yes, I think so.
what if you want to find the effects on the frequency ?
Hi, thanks for the helpful explanation. Just wanted to ask, how exactly do you know where the fundamental frequency is? Because the wave basically looks the same for me within a range of about 4-5 hz (I'm using guitar strings). Any answer would be appreciated, thank you!
Um hoping you'll see this in the morning before the exam but its the largest amplitude of the shape of that first harmonic that you take, I reckon you can also take a mean.
Tip: place a tray full of sand directly below the masses, and keep distance. I think the sand tray has something to do with absorbing the impact when the masses fall to the ground. Not entirely sure though.
An easier method is to use a safety mat (basically a square piece of foam). Place it under the masses and its way easier than getting enough sand for all the students.
Whats the time measuring??
second
Hi, sorry if this is a bit off topic but do you know of any way for someone studying independently at home can do the practical endorsement? I'm doing A level physics and maths (AS level at the moment) on my own time without a course since I can't really justify the expense of two distance a level courses (though I may be able to stretch to the fee for their written exams), but this practical endorsement is confusing. I keep seeing places online mention that it can be done, but none seem willing to talk about how, whether because they want you to pay for the full course first, or because it requires the full course full stop I don't know.
oh and do you know of any reliable online retailers where I can buy equipment for these practical things? They look fun so I can justify that expense, but buying things like data loggers and such is new territory :\
Thanks.
Could you contact your local college or sixth form to see if they could help out? I guess the alternative is you just turn up at a centre to sit the exam - but don't have the practical endorsement on your final certificate. Certainly a lot cheaper than buying all the equipment needed.
A Level Physics Online I've given that a go. The only place that is really any good for that for adults where I live is Lincoln college , and they basically flat out told me that to do the endorsement with them I'd have to sign up for the full course. They've never been the most flexible lot.
Go abroad and do the IAL (international A Level) qualification in Edexcel Physics that allows you do the practical as a written exam instead.
As someone in the same situation, I struggled with the problem for over a year, but eventually I came across a neat solution.
Pembrokeshire college run biology, physics and chemistry practical endorsements for people in independent study. For each subject there's a 4-5 day workshop in the spring of your A2 year, (covering both AS and A2) so you'll need to arrange some accommodation to stay over in Pembrokeshire, but you won't have to worry about it until next spring.
Most science courses at uni require the practical pass mark, so it's well worth doing if that's your goal. It's a very friendly and professional environment. I went to the edexcel biology workshop in Feb and I'm going to the AQA physics this week. The people doing the course have travelled from all over the UK, so you won't be alone.
I would definitely recommend doing this next year, as it's also a great way to learn all the practical knowledge you need for the written exams, and you won't need to buy any of the equipment or have any prior knowledge of lab work. :)
Good luck, either way!
Whats the L represents? Total length of wire from vibrator to the slotted mass or from the vibrator to the fixed end?
Aqib Hossain from the vibrator to the foxed end. Also have tomorrow unit 3. Good luck!
@@nicolasferrari2157 good luck for you too man. Hope we ace it❤️
Why does mass per unit length change as tension is increased/how do you work it out?
the mass per unit length is the gradient of a straight line graph where frequency squared is plotted over tension (f^2/T). Tension is equal to the mass multiplied by gravitational field strength (T=mg)
Whats the time measuring
Is wave speed not represented by the letter v and not the letter c? like this v = f * wavelength
Unless it's an EM wave I believe so, yes
I believe you are referring to another board, Edexcel in my case. He is using the AQA board so in that they use c for wave speed
Tomorrow exam!
same
Thank yoU!
Tommorow I got my IAS exam. I wish i could get a reply soon😥
Aqib Hossain we may even get the determination of wavelength by using diffraction grating and wave speed of sound using an oscilloscope
Same
same tmr ias u3 exam
tx