Biology; Chemistry; Physics: Post your doubts here!

[mohammad ahmed]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_w11_qp_21.pdf
q9 b iii???

 

[DaniyalK]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_w11_qp_21.pdf
q9 b iii???

Calculate the gradient of the straight line.

 

[Muhammad_Hamza]

??

 

[DaniyalK]

??

The normals are in red and the rays are in green. For Ray 2 the angle of incidence and reflection must match what is given in the question. I've just drawn an estimate.

 

[Muhammad_Hamza]

The normals are in red and the rays are in green. For Ray 2 the angle of incidence and reflection must match what is given in the question. I've just drawn an estimate.

When incidence ray is greater than critical angle than what happens?

 

[DaniyalK]

When incidence ray is greater than critical angle than what happens?

It gets reflected instead of refracted.

 

[Muhammad_Hamza]

The normals are in red and the rays are in green. For Ray 2 the angle of incidence and reflection must match what is given in the question. I've just drawn an estimate.

 

[asadalam]

When incidence ray is greater than critical angle than what happens?

Total Internal Reflection

 

[Muhammad_Hamza]

The normals are in red and the rays are in green. For Ray 2 the angle of incidence and reflection must match what is given in the question. I've just drawn an estimate.

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_w04_qp_2.pdf
Question 4

 

[DaniyalK]

That's what I have drawn.

 

[Dark Destination]

explain it plz

Since it's a distance time graph, you have to calculate gradient of the straight line. That gradient is 2. So answer is D.

 

[Muhammad_Hamza]

That's what I have drawn.

Nice

 

[Muhammad_Hamza]

Correct?

 

[Fate0]

Correct?

Except the middle lines, make the others a bit curved but yeah the concept is correct.

 

[Muhammad_Hamza]

Except the middle lines, make the others a bit curved but yeah the concept is correct.

Is type ke questions nae samaj ate.anyone explain me how to handle these type of questions..

 

[kirann]

help!!

 

[Dark Destination]

Can someone answer these doubts:

- What do we need to know about the Expansion of solids, liquids, gases topic?
- What are Capacitors? And what is a time delay circuit?
- Centripetal force? I can't find that anywhere in the book. =.=
- What are the ways of preventing heat loss in Homes?
- Do we need to know about Photocopies, Van De graff generators? How much is required?
- Can i skip Electronic systems? Is that a good idea?
- Do questions in Physics paper 2 repeat? What would be better, to read marking schemes, or to read the book?
- What is Linearity in a thermometer?
- And how to increase sensitivity. I know that it can be increased by decreasing the size of bore, but i also read somewhere it can be increased by increasing the volume of liquid in bulb? How does that work?
- Why should a switch and fuse be placed on the live wire?
- Diodes? What do we need to know about them?

 

[mohammad ahmed]

help!!View attachment 43033

i think its answer is B

 

[Dark Destination]

help!!View attachment 43033

W x 30 = 15 x 60
W = (15 x 60)/30

Then divide by 10, to get mass.

 

[asadalam]

Can someone answer these doubts:

- What do we need to know about the Expansion of solids, liquids, gases topic?
- What are Capacitors? And what is a time delay circuit?
- Centripetal force? I can't find that anywhere in the book. =.=
- What are the ways of preventing heat loss in Homes?
- Do we need to know about Photocopies, Van De graff generators? How much is required?
- Can i skip Electronic systems? Is that a good idea?
- Do questions in Physics paper 2 repeat? What would be better, to read marking schemes, or to read the book?
- What is Linearity in a thermometer?
- And how to increase sensitivity. I know that it can be increased by decreasing the size of bore, but i also read somewhere it can be increased by increasing the volume of liquid in bulb? How does that work?
- Why should a switch and fuse be placed on the live wire?
- Diodes? What do we need to know about them?

No.Ek dafa bura paper karo aur hamare liay gt low karo plzzz