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Physics: Post your doubts here!

Nikesh

Nikesh

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raamish said:
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s11_qp_22.pdf

Qs 1c(i) For this qs i applied the formula s=ut+0.5at2. I put 20 as (u) in the formula to get the answer. But in the marking scheme the u has been taken as 0. Please help.

Qs 5a(iii) I did: P=I2R
2.5*2.5*3.3=20.625. But in the marking scheme the solution and answer are different.
Click to expand...

In Q1, u=0 for vertical component not for horizontal, so there is use of u = 0 in MS
 
omg

omg

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Q.2 International A/AS level phy page 384!
- Describe how a sensor may be used to count the no. of mice that pass through a small hole in the wall.
please any1 ans it!
 
Nemo

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Walaikum As Salaam Warahmatullah,
I'd like to know the limitations and Precautions for 'heat' experiments in AS physics P.3. Sorry if its too much :)
Wa antum fajazakumullahu khair.
 
smzimran

smzimran

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AoA
omg said:
Q.2 International A/AS level phy page 384!
- Describe how a sensor may be used to count the no. of mice that pass through a small hole in the wall.
please any1 ans it!
Click to expand...
Probably using light gates
;)
 
Nikesh

Nikesh

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omg said:
Q.2 International A/AS level phy page 384!
- Describe how a sensor may be used to count the no. of mice that pass through a small hole in the wall.
please any1 ans it!
Click to expand...

Using light gates in the hole of a wall.....electronic counter will also be required to increase the number, when any mouse crosses that light gate, counter will increase the display number....
 
Nikesh

Nikesh

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hm12 said:
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s11_qp_23.pdf

please can someone explain question 6 part b
Click to expand...

it there is not given the graph of displacement against time but its given against distance along string
i.e. here u will find wavelength instead of time period (T)
it is said that for a time 0.25T, Since Time period and wavelength are identical in graphical representation u can compare it with wavelength.
From graph u will c that wavelength of wave is 80 cm and new wave starts from 0.25*80 which is 20 cm
so draw a new wave of same nature starting from 20 cm
 
H

hm12

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Nikesh said:
it there is not given the graph of displacement against time but its given against distance along string
i.e. here u will find wavelength instead of time period (T)
it is said that for a time 0.25T, Since Time period and wavelength are identical in graphical representation u can compare it with wavelength.
From graph u will c that wavelength of wave is 80 cm and new wave starts from 0.25*80 which is 20 cm
so draw a new wave of same nature starting from 20 cm
Click to expand...


okay got it thank you:)
 
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