Physics: Post your doubts here!

[GarryTheGhost]

well then thats easy
use I2R = Power to find the power for each current
but dont take current as -1
take it as 1 since power does not have a direction
ad the powers n youll get 500W
divide it by 2 n the answer will be 250 W

Bro that was not easy

 

[Shimmery woods]

que 43 please!!!!

 

[furuta]

15. mass=weight/gravity
600000/9.81=61162
KE=1/2 *61162*40*40
KE=12MV
Answer=C

29. W=QV
Fd=QV
F=1.6*10-19 *200/0.005
=6.4*10-15

thank you sooo much

 

[Shimmery woods]

que 2 please

 

[Shimmery woods]

que 30 anyone ?

 

[amina1300]

Bro that was not easy

I still dont get this one.. :/ why divide by 2 ?

 

[Zaki ali asghar]

E=f/q 0.50*9.81/1000*1000/1.0^10-12

 

[amina1300]

que 30 anyone ?

E=F/q= mass(kg)*9.81/1x10^-12

 

[Minsa Fatima]

I still dont get this one.. :/ why divide by 2 ?

its mean power and for average we divide by 2

 

[Shimmery woods]

E=F/q= mass(kg)*9.81/1x10^-12

thankyou!

 

[Minsa Fatima]

 

[Holmes]

The wavelength is 0.165m. After 0.165 further away, the same wave pattern will be repeated. Hence D is the appropriate option.

Thanks.

 

[amina1300]

its mean power and for average we divide by 2[/QUOT
For avg we divide it by the number of currents taken. If I take 2 , 1 and -1 (divide by 3 ) wrong answer. It isn't intuitive to take only 2 and -1 ??!!

 

[Holmes]

reason

 

[amina1300]

Thanks.

Holmes which Q is this?

 

[Holmes]

Solve it please with vivid working!

 

[Holmes]

Holmes which Q is this?

 

[amina1300]

reason
View attachment 62525

Is A correct?

 

[Holmes]

Is A correct?

Yes

 

[Holmes]

I think its D

no it is A