Physics 9702 P21

[Tareq Alqam]

hello every body who remembered the question plz write them and I will answer all the questions
physics teacher

 

[saadkhan97]

it was easy

kaminay saqib ghalat answer bolay ja rha hai RESISTANCE WAS = 3 ohm

CURRENT = 6A
power dissipated= 28w
when third lamp is added so , pd across battery is more .

 

[saadkhan97]

and in the amplitude question I think it was 1.5mm right?
and wavelength I counted the number of wavelengths and divided it by the number in the figure..

ABSOLUTELY

 

[Ahmed Khattab]

Guys the grade boundries will be around 35-38 i guess!

 

[Mohamed1212]

What was the distance in the first question?

 

[Ahmed Khattab]

I used area under graph it was a trapezium.q

 

[Mohamed1212]

I used area under graph it was a trapezium.q

Was it around 48-50?

 

[Ahmed Khattab]

Honestly i dont remember but yea i guess

 

[JoBy1NoBa]

Was it around 48-50?

I think it was 67.5m or something, Area of the triangle + the rectangle

 

[Yunus haji]

I think it was 67.5m or something, Area of the triangle + the rectangle

i got 75

 

[Wolfgangs]

It was 62.5m, area under trapezium

 

[Ahmed Khattab]

Yeah thts right

 

[Aizah K]

yes the defination of emf n pd is rght

 

[Wolfgangs]

yes the defination of emf n pd is rght

You mean my definition?

 

[Wolfgangs]

What about the direction of acceleration and force in the first question ?

 

[Wolfgangs]

What about the direction of acceleration and force in the first question ?

 

[Ahmedlool]

i put them both to the right

 

[Wolfgangs]

i put them both to the right

You mean to the opposite direction of the cars motion?

 

[NabzJ]

What about the direction of acceleration and force in the first question ?

I personally put accelaration to the left and the resultant force to the right as it was still moving to the right but at a slower rate...

 

[Wolfgangs]

For the radioactivity question. For the betas decay, I mentioned that the nucleus gains one proton, but didn't mention that it loses neutron. Is it okay?
And do we consider a beta particle to have a proton number of -1? (General question XP}