HOW WAS PHYSICS PAPER 5 PPL ? HOW WAS YOUR EXAM ?

[Rabib_69]

I connected voltmeter and ammeter to the fan.

LIKE A BOSS

ahahah how do current and Emf value help xP

 

[kirashinagami]

And measured what? The resistance?

Yes. Then from resistance, R = speed x mass of wind.

Lol joking, i cant do it

 

[toxicdevil]

I connected voltmeter and ammeter to the fan.

LIKE A BOSS

I did something similar. I varied the voltage and the speed of fan was proportional to the voltage.

 

[Rabib_69]

ahahah, naa man, this cud be a revolutionary formula..next einstein ;D

Yes. Then from resistance, R = speed x mass of wind.

Lol joking, i cant do it

 

[Rabib_69]

or people, u can just move the fan away and closer to the balloon!! that way, the force on it will also be varied..ahahahahah SOO EASYYY

 

[toxicdevil]

And I drew the Dyson's bladeless fan. So that the air is uniform. ;P

 

[kirashinagami]

Hahaa some people even draw hot air balloon and men, conducted inside the lab.

 

[toxicdevil]

or people, u can just move the fan away and closer to the balloon!! that way, the force on it will also be varied..ahahahahah SOO EASYYY

I specifically kept the distance constant as Distance has nothing to do with speed. I thought so at that moment.

 

[kirashinagami]

And I drew the Dyson's bladeless fan. So that the air is uniform. ;P

It is even in our syllabus?

 

[ousamah112]

surely examiner will laugh so hard watching these revolutionary experimental forms..

 

[kirashinagami]

or people, u can just move the fan away and closer to the balloon!! that way, the force on it will also be varied..ahahahahah SOO EASYYY

We need to know the value of V

 

[Rabib_69]

I specifically kept the distance constant as Distance has nothing to do with speed. I thought so at that moment.

no, its more abt the force on the ballooon. think of it this way, when ur closer to the fan, u feel a greater force than when ur far from it..

 

[Rabib_69]

We need to know the value of V

why??

 

[kirashinagami]

why??

The equation given needs the value of v

 

[ishraqul]

how did u measure the wind speed? i dont think it was in our syllabus

 

[Damn]

why??

apnar email id ta den

 

[jackrabbit]

how did u measure the wind speed? i dont think it was in our syllabus

Yeah I guess you could use an anemometer, but since its not in our syllabus, I dont know if the examiners expect us to know that, what I did was use a fan with different speeds, use light gates, find the time taken for baloon to move a certain distance, and use d/t to find speed. Because the speed of the fan will be equal to the speed of the balloon , I dont know if this is valid at all, can any1 confirm this method, also. I totally forgot about using a protractor to measure the angle, I said measure the height and the horizontal distance, use tan=adj/opp ,ugh

 

[vampire fairy]

Yeah I guess you could use an anemometer, but since its not in our syllabus, I dont know if the examiners expect us to know that, what I did was use a fan with different speeds, use light gates, find the time taken for baloon to move a certain distance, and use d/t to find speed. Because the speed of the fan will be equal to the speed of the balloon , I dont know if this is valid at all, can any1 confirm this method, also. I totally forgot about using a protractor to measure the angle, I said measure the height and the horizontal distance, use tan=adj/opp ,ugh

how r u suppose to draw a light gate?

 

[Damn]

Yeah I guess you could use an anemometer, but since its not in our syllabus, I dont know if the examiners expect us to know that, what I did was use a fan with different speeds, use light gates, find the time taken for baloon to move a certain distance, and use d/t to find speed. Because the speed of the fan will be equal to the speed of the balloon , I dont know if this is valid at all, can any1 confirm this method, also. I totally forgot about using a protractor to measure the angle, I said measure the height and the horizontal distance, use tan=adj/opp ,ugh

what did u write in additional details?

 

[jackrabbit]

what did u write in additional details?

Um I just wrote, do repeats of the measurements of lengths using a ruler, take averages, keep temperature, pressure (and hence volume of helium constant) by filling it to a set pressure level using a pressure gauge to measure pressure, keep length of string constant, and for safety I had noo idea, I was just like be careful not to get ur fingers cut by the blades of the fan LMAO, I mean whos gonna stick their fingers in the rotating blades of a fan

how r u suppose to draw a light gate?

Um yeah You dont have to draw, you could just as well state it