Physics, Chemistry and Biology: Post your doubts here!

[Stephanie Hyacinth]

so i shudnt use a uniform scale just put the boundaries at the x axis and do it

yeah, don't do that

 

[Awesome12]

This one too. Sorry if i am pestering................

(a) The terminals are always connected to the Y-Plates of the oscilloscope

(b) If we apply a voltage on the Y-Plates (the spot will move up and down ) (Imagine this as the y and x-axis like in geometry, the y-axis being the path of movement of the Y-plates ...)

(c) The time base is the other name for the X - Plates. It causes the spot to move sideways. In this case, since the spot is moving up and down only, it is presumably off

 

[Muhammad_Hamza]

I think they are wrong. Firstly the direction of the arrows in the first coil should be in the opposite direction, but the central arrow is correct. Plus the magnetic field lines of the coils should intersect or touch, and only then will emf be induced

Yaar ap mujhe correct kr ke inbox kr do plz...

 

[Stephanie Hyacinth]

does anyone know where to get the specimen papers from?

 

[Awesome12]

Yaar ap mujhe correct kr ke inbox kr do plz...

Give me the link of the paper (unedited), and i will solve this part for you and post it here. You can't upload a pic in inbox

 

[Ameena Eesa]

Howzzit dunn?

 

[Ameena Eesa]

To create cathode rays in a vacuum, what might be a suitable p.d to connect bw the cathode and anode? It'll be a.c or d.c?

 

[Muhammad_Hamza]

Give me the link of the paper (unedited), and i will solve this part for you and post it here. You can't upload a pic in inbox

Please open this in Paint and edit it. thankx

 

[Ameena Eesa]

How can i know the answer fr part c ???????.....................................

 

[Stephanie Hyacinth]

View attachment 40970


View attachment 40971






How can i know the answer fr part c ???????.....................................

what are your results from the table and the first length?

 

[Ameena Eesa]

what are your results from the table and the first length?

l= 0.29 cm
T= 1.12 s

 

[saif mahmoud]

A school has been given money to buy computers. it can now buy enough computers for each student. Discuss the advantages and disadvantages of having laptop computers or extra computer rooms connected to the network .


Hope someone can help me out with this question ?

 

[Ameena Eesa]

what are your results from the table and the first length?

l= 0.29 cm
T= 1.12

 

[Faizan Muhammmad]

A school has been given money to buy computers. it can now buy enough computers for each student. Discuss the advantages and disadvantages of having laptop computers or extra computer rooms connected to the network .


Hope someone can help me out with this question ?

adv
portable
wireless
not restricted to a place

disadv
pupil distracted
less robust
battery runs out

 

[saif mahmoud]

l= 0.29 cm
T= 1.12

r u sure that it is 0.29 cm

 

[Stephanie Hyacinth]

l= 0.29 cm
T= 1.12 s

answer: no the results don't support this suggestion
evidence: the 2nd period is not double of the 1st period, difference of 0.46 which is not up to 1.12

 

[saif mahmoud]

adv
portable
wireless
not restricted to a place

disadv
pupil distracted
less robust
battery runs out

thanks

 

[saif mahmoud]

answer: no the results don't support this suggestion
evidence: the 2nd period is not double of the 1st period, difference of 0.46 which is not up to 1.12

but how is 61.9 double of 0.29

 

[Mai(M4!)]

Explain why there is an increased efficiency
in supplying green plants as human food and
that there is a relative inefficiency, in terms of
energy loss, in feeding crop plants to animals ??

 

[saif mahmoud]

Explain why there is an increased efficiency
in supplying green plants as human food and
that there is a relative inefficiency, in terms of
energy loss, in feeding crop plants to animals ??

Mai(M4!)
okay i will tell u the ans but not 100% sure

see, when humans consume green plants as there food they are acting as primary consumer while
when animals are fed on the crop plants then we consume the animals then we are secondary consumer
so it is more efficient to be at primary consumer level as we will have more energy gained due to less number of trophic levels and when animals consume the plants first they lose alot of energy in respiration, movement and excretion even fighting diseases so eating plants directly gives more energy so more efficient due to less energy loss by animals because as the trophic level increases the energy available decreases .

Hope this was the right answer