- Messages
- 94
- Reaction score
- 29
- Points
- 28
Answer is C, anyone explain?
I really don't get this one, help anyone, answer is D
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Good job buddy.Nice explanation.Exeptional........speed 33 m s^–1
density of the air is 1.2 kg m^–3.
The wall has an area of 12 m^2
What is the force?
First u relate with ur data givien,
So to relate
Density = mass/volume
How u get volume from data?
The only way is to to relate speed and area.
Speed multiply with area
33 X 12 = 396m^3 s^-1
Relate density with this data
1.2 kg m^-3 X 396m^3 s^-1 = 475.2 kg s^-1
Now how to relate to force?
F=ma
F=m(v-u)/t
Since u found m/t = 475.2
Sub ur values
Force = 475.2 (33 - 0)
Force = 15681
= 16000N
Boss ,1st question option a and d cannot as the emf never changes in whatever situation.It is the p.d that differs.How can it be work overcome against resistor??.It must be internal resistance because it is not the overall voltage that is significant here but it is the p.d across dry cell(overcome internal resistance..
Answer is C. Always see this question, but never really understands it.
Anyone explain? Answer B
For the 1st question,its simple.Get the volume by density formula.Then square root it with 3 n u will gwt the distance.
Answer is C, anyone explain?
I really don't get this one, help anyone, answer is D
Bro for 1st question I am not sure.My logic is this,the gradient is FL/AXCan anyone explain
Answer is 2 and 3. Why?
And
Answer is D. Is it because it is impossible to be 0A current when there is max PD?
For the 1st question,its simple.Get the volume by density formula.Then square root it with 3 n u will gwt the distance.
I am not sure with the second one.
Thank u boss.Just found out how to do 2nd one,
Use formula s=ut + 1/2at^2
Firstly
x = 0 + 1/2a(t1)^2
Next
x + h = 1/2a(t2) ^2
Sub together
1/2a(t1)^2 + h = 1/2a(t2)^2
And I think u know how to move the rest into correct places Thanks a lot!
U imagine ur hand curve into the same shape, u will realised the part of Z is a compression. Just like when u bend a eraser, there will be a tension on top, but compression belowHai guys,anyone can explain why is z compression?I think i know why point x n y is tension as it is against weight.
Thanks man,super example.U imagine ur hand curve into the same shape, u will realised the part of Z is a compression. Just like when u bend a eraser, there will be a tension on top, but compression below
plz help
cant open your document.
plz help
cant open your document.
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