Physics: Post your doubts here!

[kitkat <3 :P]

should we memorize estimations :/??

 

[princeali97]

Um its October November 2010 paper 21.. If you can open it on google please :$ because I am from my cellphone

Uhm what was the question number? I will try

 

[princeali97]

should we memorize estimations :/??

YES! there are a number of them.You can check in your physics coursebook pg#554

 

[kitkat <3 :P]

YES! there are a number of them.You can check in your physics coursebook pg#554

thanks m just starting dunno when i'll finish :'(

 

[TheJDOG]

should we memorize estimations :/??

Up to you, if you're too lazy, you can rely on logic

 

[danial 234]

YES! there are a number of them.You can check in your physics coursebook pg#554

book name???

 

[kitkat <3 :P]

LOL k

Up to you, if you're too lazy, you can rely on logic

 

[kitkat <3 :P]

book name???

physics coursebook

 

[sma786]

Uhm what was the question number? I will try

Question 2(a) thankew

 

[Zepudee]

Why is the brightness of images increases as the order number increases?

 

[princeali97]

thanks m just starting dunno when i'll finish :'(

Uhm here are a few which i found in the past papers.I hope these help.
Thickness of paper: 0.05-0.15mm
Time for sound to travel 100m in air:0.25-0.5s
weight of 1000cm3 water:8-12N
Speed of sound in air:330ms-1
Density of air at rtp:0.00125 g/cm3
Mass of protractor: 10g
Volume of the head of an adult person in cm3=3000cm3

 

[kitkat <3 :P]

Uhm here are a few which i found in the past papers.I hope these help.
Thickness of paper: 0.05-0.15mm
Time for sound to travel 100m in air:0.25-0.5s
weight of 1000cm3 water:8-12N
Speed of sound in air:330ms-1
Density of air at rtp:0.00125 g/cm3
Mass of protractor: 10g
Volume of the head of an adult person in cm3=3000cm3

thank u

 

[JAVERIA INAM DANISH]

An aircraft travels the first 200m in 6 seconds and the next 200m in 4 seconds. Calculate the initial velocity and the acceleration of aircraft.
Please help!!
Does anyone know its answer?

 

[kitkat <3 :P]

An aircraft travels the first 200m in 6 seconds and the next 200m in 4 seconds. Calculate the initial velocity and the acceleration of aircraft.
Please help!!
Does anyone know its answer?

whats the correct answer

 

[JAVERIA INAM DANISH]

Not known.

 

[DeViL gURl B)]

Guys is this the perfect definition ?
BROWNIAN MOTION : It is defines as the random motion caused by the smoke particles colliding with the fast moving air molecules.
Where do we include the spec of light? :$

 

[princeali97]

Question 2(a) thankew

a (i) So we know that the horizontal component is 8.2ms-1 since there the horizontal component never changes.
So Vcos60=8.2 (V is the Resultant velocity)
V=16.4ms-1
So, U know that vertical component =Vsin@
16.4sin60=14.2ms-1
ii) Since we are dealing with the vertical height here we will use the VERTICAL component of velocity.
So, initially u can see that vertical component of velocity=0
So v^2=u^2+2gh
(14.2)^2=2(9.81)h
h=10.3.
iii)This one is simple.U have to know the concept that the horizontal component of velocity remains constant.So the distance x u can easily get by multiplying the time taken with the horizontal component of velocity.So U find time like this:
V=u+gt
14.2=0+9.81t
t=1.4475s
X =v x t
X=8.2 x 1.4475
X=11.87m.
I hope u understood this question.If u have any problem i will try my best to respond.
Welcum.

 

[princeali97]

book name???

Rocket science.
jk.Coursebook ofcourse.

 

[kitkat <3 :P]

An aircraft travels the first 200m in 6 seconds and the next 200m in 4 seconds. Calculate the initial velocity and the acceleration of aircraft.
Please help!!
Does anyone know its answer?

m not sure but i think we are gonna do it simultaneously ._. like
200= 6u+0.5a(6)^2
200=4u+0.5a(4)^2

 

[Suchal Riaz]

From now i am available for answering any physics questions. My revision is almost complete except w13 paper. Thought blocker