Physics, Chemistry and Biology: Post your doubts here!

[fahadhameedahmad]

I checked your youtube channel, And Ive observed that even though you do lectures really clearly and thoroughly but still your videos dont have much views.Im mostly on youtube so I know what kind of videos get views ,so just to give advice your videos are perfect but which factor really engenders more views will be a catchy thumbnail.All you need is a thumbnail for all your videos and then I guearanee you you,ll have millions of subsribers in a matter of days.Hopefully this advice was helpful.

thank you for the advice, I will definitely work on the thumbnails, but not really into views right now. i just need to make a ton of videos to complete the O&A level course first. The O'level course is almost complete.

would be wonderful if you would share these lectures on your facebook/whatsapp groups etc.

Best,
Fahad
www.fahadsacademy.com
www.youtube.com/fahadsacademyonline

 

[whyareallnamestaken]

Pls help me solve this question
I know its rather hard but just tell me what you think is right please...
A uniform metre rule of weight 0.9N is suspended horizontally by 2 vertical loops of thread A and B placed at 20cm and 30cm from its ends respectively. Find the distances from the centre of the rule at which a 2N weight must be suspended:
i) to make loop A become slack
ii) to make loop B become slack

Distance of loop A from the centre= 30cm
Distance of loop B from the centre= 20cm

i) Distance of 2N weight such that loop A becomes slack:
0.9 x 30 = 2 x d
d= 13.5cm

ii) Distance of 2N weight such that loop B becomes slack:

0.9 x 20= 2 x d
d= 9cm


My physics is absolutely horrendous so I am not certain if i solved this correctly. Any suggestions/ improvements/corrections would be greatly appreciated.

 

[Khadu33]

Guys help me out with this phys question in alternative to practical 1)how to find centre of mass of a regular object

 

[Khadu33]

1st pic is from 2005 oct/Nov and the other is from 2006 may/June all varient 2

 

[fahadhameedahmad]

Guys help me out with this phys question in alternative to practical 1)how to find centre of mass of a regular object

Tie it to a nail with string and trace the string repeat at different points. Each time tve string passes through the center of mass. I tersecting line is center.

www.fahadsacademy.com
www.youtube.com/fahadsacademyonline

 

[Ayesha Asif333]

Tie it to a nail with string and trace the string repeat at different points. Each time tve string passes through the center of mass. I tersecting line is center.

www.fahadsacademy.com
www.youtube.com/fahadsacademyonline

Isnt this method for finding center of mass of an irregular object? Or is it the same for both regular and irregular objects

 

[Khadu33]

Isnt this method for finding center of mass of an irregular object? Or is it the same for both regular and irregular objects

What fahad posted is for irregular object

 

[Adeen Atif]

thank you for the advice, I will definitely work on the thumbnails, but not really into views right now. i just need to make a ton of videos to complete the O&A level course first. The O'level course is almost complete.

would be wonderful if you would share these lectures on your facebook/whatsapp groups etc.

Best,
Fahad
www.fahadsacademy.com
www.youtube.com/fahadsacademyonline

Happy to help
I'll surely tell my friends about your lectures
Good luck for future!
Best,
Adeen

 

[Adeen Atif]

Guys help me out with this phys question in alternative to practical 1)how to find centre of mass of a regular object

Finding the centre of mass for symmetrical objects
The centre of mass for a symmetrical object can be found easily. The axes of symmetry are marked on the object. The centre of mass is where the axes of symmetry cross.

P.s: Symmetry means Regularity

 

[Ayesha Asif333]

BTW guys did you know the center of mass of a circular ring is in the air! so it does not necessarily have to be inside the object

 

[Ayesha Asif333]

Finding the centre of mass for symmetrical objects
The centre of mass for a symmetrical object can be found easily. The axes of symmetry are marked on the object. The centre of mass is where the axes of symmetry cross.

P.s: Symmetry means Regularity

Thanks ....so an object of uniform thickness and density has its mass evenly spread throughout and its centre of mass is its geometrical centre

 

[Adeen Atif]

BTW guys did you know the center of mass of a circular ring is in the air! so it does not necessarily have to be inside the object

Really!

 

[Adeen Atif]

Thanks ....so an object of uniform thickness and density has its mass evenly spread throughout and its centre of mass is its geometrical centre

No problem!
Yeah you, re correct as well.

 

[Adeen Atif]

But Guys, Why are we going so deep in the harder parts of the questions.I mean we only have paper 6 and 2 tomorrow ,not paper 4?

 

[fatimaw]

Guys i need help in physics whats the hardest paper u have ever done it would be better if they are from 2016
and any important tips especially for paper 6 because i am suffering in tht paper
thanks!

 

[fatimaw]

ALSO can u explain why the answer is A not C

 

[Phenomenal]

Guys how do i study for the Multiple choice paper 22 physics?

 

[fatimaw]

Guys how do i study for the Multiple choice paper 22 physics?

i would suggest practice at least 6 and jst read over ur notes get a overall idea......

 

[fatimaw]

at least 6

PASTPAPERS

 

[Hanzalla]

Guys how do i study for the Multiple choice paper 22 physics?

Physics MCQs are quite easy if you get the concept!