Physics Pop Quiz

eZe^

JC 2K3 wrote:

Do you have Real World Physics? Look at page 303.

I doubt they'd tell you how to do it were it not on the syllabus...

Its not on the syllabus, trust me. My teacher always laughed at why they wouldnt just define it properly as BIL SinA... Dan O Regans son is in my class, I could ask him, but by the time Ive the answer we would never have to do physics again! Im 100% sure though.

Nehpets

Don't know the term but shortsightedness is corrected by a diverging lens and longsightedness is corrected by a converging lens. They are both caused by not being able to increase (short) or decrease (long)

edit: beaten again lol

ZorbaTehZ

Looks like I'll be the one asking the questions then.

Q: Give the quark composition of a proton OR a neutron.
(And if you're not doing that option ... then you suck)

Limerick Dude

Thanks Jc and carlowboy for clearing that up for me

ninebeanrows

ZorbaTehZ wrote:

Looks like I'll be the one asking the questions then.

Q: Give the quark composition of a proton OR a neutron.
(And if you're not doing that option ... then you suck)

2 o's in proton so UUD

1 o in Neutron so UDD

ron-burgandy

derive the relationship between the velocity of a particle travelling in uniform circular motion and it's angular velocity.

madnirvana

ron-burgandy wrote:

derive the relationship between the velocity of a particle travelling in uniform circular motion and it's angular velocity.

0=S/r

0= Angle in rads s=length of curve r = radius

divite bth sides by t

0/t= s/t * 1/r

0/t= W angular velocity v= s/t

=> W=v/r v=wr

.................
Is the VECTORS CHAP GONNA COME UP? cuz we never did it in class :eek: :eek:

Nehpets

ron-burgandy wrote:

derive the relationship between the velocity of a particle travelling in uniform circular motion and it's angular velocity.

Linear Velocity, v
Angular Velocity, w
Angle, *

v=l/t

l=r*

v = r*/t

w = */t

therefore, v = rw

madnirvana

Is the VECTORS CHAP GONNA COME UP? cuz we never did it in class

Nehpets

Read over it, you'd have read and understood it in the time it took you to type that post

Smegball

Seemingly I am the only one going to fail tomorrow

ZorbaTehZ

Boons! L2post another question.

carlowboy

Derive F=qvB

nedward

F=BIL
I=Q/t
L=vt

F=BQvt/t

F=QvB


Derive the equations for resistance of resistors in series and in parallel.

carlowboy

In parallel:
I = I1 +I2
V/R= V/R1 + V/R2

1/R= 1/R1 + 1/R2

Series
V= V1 +V2
V= IR1 + IR2
V= I( R1+ R2)
V/I= R1 +R2
R= R1 +R2

Give an example of a lepton, baryon and meson

The Filth

I= I1 + I2
I=v/r
v/r=v/r1+v/r2
1/r=1/r1=1/r2

In the experiment to investigate equilibrium with a meter stick why is it easier if the meter stick is horizontal?

Edit:damn not quick enough

nedward

Lepton-electron
Baryon-neutron
Meson-Pi meson

The metre stick is horizontal to ensure that the vector sum of the forces shown on the spring balance is acting downwards. Also, the distances between the spring balances can be taken as horizontal along the metre stick. Please God the examiner is as confused as my explanation and gives full marks!


Who discovered the positron, and who detected the neutrino?

ZorbaTehZ

Lepton : Electron
Meson : Positive Pion
Baryon : Positive Sigma

Horizontal meterstick so that forces can be taken to be applied where the Newton Balance is attached to it, and so that Newton Balance only gives applicable reading.

Q: Three uses of a capacitor.

ZorbaTehZ

Positron was predicted by Dirac, and Neutrino was detected first by Cowan and Reines.

Q: (Mine Above)

EDIT: My bad, read the question incorrectly, Positron was discovered first by Anderson.

nedward

Flashes in cameras.
Radio tuners.
To smooth out variations in d.c. (an inductor?)

EDIT: Question: Three functions of an inductor.

carlowboy

ZorbaTehZ wrote:

Positron was predicted by Dirac, and Neutrino was detected first by Cowan and Reines.

Q: (Mine Above)

EDIT: My bad, read the question incorrectly, Positron was discovered first by Anderson.

Where does Fermi come into the neutrino then?

nedward

Does he? Pauli predicted its existence. Oh, it was in his experiments that there was "missing" momentum and energy, provided by the neutrino.

carlowboy

ZorbaTehZ wrote:

Baryon : Positive Sigma

And that's just showing off

carlowboy

No one's asking questions.....Define the Weber.

ZorbaTehZ

Is it?

Neutrino:
Pauli predicted its existence in 1930.
Cowan and Reines actually detected it, in 1956.

Fermi doesn't come into it though, I believe ...

EDIT: Typo

nedward

One weber is the magnetic flux density when one tesla acts over 1 metre squared. None of your Jes nonsense.

Why is a car said to be accelerating when it rounds a corner at a steady speed?

carlowboy

Says in the 2004 paper that Fermi gave it the name the "neutrino"

carlowboy

nedward wrote:

One weber is the magnetic flux density when one tesla acts over 1 metre squared. None of your Jes nonsense.

Why is a car said to be accelerating when it rounds a corner at a steady speed?

acceleration is a vector quantity that takes direction into consideration.


Define the Ampere!

nedward

The ampere is that constant current, which, if maintained in two parallel conductors of negligible cross-sectional area 1m apart in a vacuum will produce a force of 2 x 10^-7 N per metre of length.


Define potential difference and the volt.

ZorbaTehZ

V=W/Q
The volt is the work done per unit charge.

Q: Name two of the fundamental forces and give two of their characteristics.