Physics: Post your doubts here!

[Student12]

Question 3, 4 , 5 , 8 , 11 , 14 , 15 , 19 , 24 , 33 , 35 , 37 , 38 PLEASEEEE!http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w13_qp_12.pdf

Thought blocker

 

[Thought blocker]

Thought blocker

Please now I want to do my preparation... I'll solve it at night...
IF ANYONE CAN HELP HER!!!
I AM BUSY NOW IN MY SCHEDULE !

 

[ashcull14]

Question ?

attatchment 4251

 

[Thought blocker]

View attachment 45251 hey where am i going wrong?
i did it like this:- net emf=3-1.2=1.8V
V1=9/27*1.8=0.6V
0.6/9=0.067...y is my ans wrong?

0.2 ?

 

[ashcull14]

0.2 ?

.YEA//HW?

 

[Thought blocker]

.YEA//HW?

Here Resistors are connected in parallel, so there will be different currents in the circuit...
we are asked for the 9Ω resistor
so I = V/R
I = (3-1.2) / 9 = 0.2A

 

[ashcull14]

Here Resistors are connected in parallel, so there will be different currents in the circuit...
we are asked for the 9Ω resistor
so I = V/R
I = (3-1.2) / 9 = 0.2A

thnks ...(silly me..:s)

 

[Thought blocker]

thnks ...(silly me..:s)

Help Student12 Please.

 

[Student12]

Help Student12 Please.

Do some of them at least or by tonight.. :/ i know you have to prepare.

 

[chymera]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_13.pdf

question 21


thought blocker????

 

[ashcull14]

 

[Mohammad Farzanullah]

plz explain the scenario at Y. i cant figure it out

 

[Thought blocker]

Do some of them at least or by tonight.. :/ i know you have to prepare.

yeah will do it tonight

 

[Thought blocker]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w12_qp_13.pdf

question 21


thought blocker????

LAST ANSWER NOW!!! BYE

 

[Student12]

yeah will do it tonight

Thanks

 

[mehria]

Do some of them at least or by tonight.. :/ i know you have to prepare.

wait.. m gonna solve them... but i need sumtym

 

[Student12]

View attachment 45255

Ep = mgh = (h/4) ( h/2 is the height from m the midpoint to the depth)= mgh/4

 

[ashcull14]

if the rate is

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w12_qp_13.pdf

question 21


thought blocker????

constant then the kinetic energy would be zero...as it loses gpe....so only option left is B

 

[Zepudee]

A turbine at a hydroelectric power station is situated 30 m below the level of the surface of a large
lake. The water passes through the turbine at a rate of 340 m3
per minute.

The overall efficiency of the turbine and generator system is 90%.

What is the output power of the power station? (The density of water is 1000 kg m–3.)
A 0.15 MW B 1.5 MW C 1.7 MW D 90 MW

ANS: B

 

[ashcull14]

Ep = mgh = (h/4) ( h/2 is the height from m the midpoint to the depth)= mgh/4

thnks