Physics - December 2006

2006-12-09 06:31:01 · 4 answers · asked by comedycatalyst 2

2006-12-09 06:19:47 · 5 answers · asked by Anonymous

As the captain of the scientific team sent to Planet Physics, one of your tasks is to measure gravity. You have a long, thin wire labeled 1.15 g/m and a 1.22 kg weight. You have your accurate space cadet chronometer but, unfortunately, you seem to have forgotten a meter stick. Undeterred, you first find the midpoint of the wire by folding it in half. You then attach one end of the wire to the wall of your laboratory, stretch it horizontally to pass over a pulley at the midpoint of the wire, then tie the 1.22 kg weight to the end hanging over the pulley. By vibrating the wire, and measuring time with your chronometer, you find that the wire's second harmonic frequency is 200 Hz . Next, with the 1.22 kg weight still tied to one end of the wire, you attach the other end to the ceiling to make a pendulum. You find that the pendulum requires 313 s to complete 200 oscillations. Pulling out your trusty calculator, you get to work.

What value of gravity will you report back to headquarter

2006-12-09 05:59:46 · 4 answers · asked by MattS 1

we know:
Poission's ratio: is the ratio of transverse contraction strin to longitudinal strain>

2006-12-09 05:31:47 · 4 answers · asked by asd 1

can someone help understand that an object is actually accelerating inward in a circular motion? i mean, i can only see the object is traveling a constant velocity but i just can not see it is accelerating.

2006-12-09 05:29:56 · 4 answers · asked by      7

If you had a hollow wire with a square cross section carrying a total current I along its length, what could you say about its magnetic field?

2006-12-09 05:27:28 · 5 answers · asked by chica1012 2

what would you do before you hit the ground

2006-12-09 05:11:37 · 16 answers · asked by Anonymous

Could humans survive if the gravity of Earth was several times stronger than its present state on Earth now, artificial gravity can be created by a spinning object.

2006-12-09 04:58:45 · 4 answers · asked by Nick S 2

I mean to create artificial gravity in space you need a very large object about a mile in diameter that has to rotate. So I'm saying if Earth span faster would that create a stronger Gravitational pull.

2006-12-09 04:51:56 · 11 answers · asked by Nick S 2

What purpose do space satellites serve? (For all purposes entertainment etc.

2006-12-09 04:37:11 · 2 answers · asked by Alice C 4

How come you are more likely to see a mirage in a hot day rather than a cold one?
Can anyone explain?

2006-12-09 04:22:31 · 6 answers · asked by Anonymous

Could you please help me I don't want some fancy explaination but some simple one and maybe an example help would be appreciated please and thank you!

2006-12-09 04:11:18 · 7 answers · asked by Alice C 4

Can you please provide an example of this? Thanks!!!

2006-12-09 03:54:58 · 4 answers · asked by Br 3

is there any tools to create a track with ultrasonic tune in a pc ? and how will the media players respond to the ultrasonic tracks ?

2006-12-09 03:52:57 · 2 answers · asked by anonymousbin 1

2006-12-09 03:49:32 · 4 answers · asked by Harold T 1

Hint: First show that the first sound heard by the observer came from the jet when the line connecting the observer and the jet is perpendicular to its path. a jet flies toward higher altitude at a constant speed of 160m/s in a direction making an angle x with the horizontal. An observer (at x), on the ground, hears the jet for the first time when it is directly overhead. Determine the value of x if the speed of sound in air is Vsound = 339m/s. Answer in units of deg.

2006-12-09 03:43:20 · 3 answers · asked by glorydefined 1

Anybody who knows about Bernoulli's equation will know that as the area of a tube narrows, the flow velocity must increase. If no other force acts on the fluid, the pressure at the tube with a wider diameter must be greater than the presure at the point of the tube with a smaller diamter.

I dont understand why is the pressure at the wider diamter tube section higher compared to the one at the smaller diameter. I thought that if the force of the fluid is spread out over a larger area, the pressure would fall?

Please explain! This question has been bugging me for a long time!

2006-12-09 03:42:34 · 1 answers · asked by n707jt 2

2006-12-09 03:39:18 · 7 answers · asked by Harold T 1

2006-12-09 03:32:31 · 4 answers · asked by savagely_honest1 1

Just wondering.

2006-12-09 03:28:07 · 29 answers · asked by dey_denn 1

2006-12-09 02:59:36 · 4 answers · asked by tokenwhtgrl 2

2006-12-09 02:51:40 · 9 answers · asked by Anonymous

it is related to every day science . Maybe centripetal or centrifugal force has something to do with it

2006-12-09 02:26:36 · 7 answers · asked by danial 1

point in red green and violet colors on plain paper . There is another paper with the same pen in another place. When the light points in place A move in the defined rectangular base shape the pen moves in the other place (automatic writing) highlighting those same exact points with the opposite color coordinate when viewed through a special eye screen it displays the original "point movement map" made in paper A "the hand that moved the pen in the mapped points" "the hand that rocks the cradle is the hand that twists the ladle"

2006-12-09 01:31:38 · 2 answers · asked by Anonymous

in the field of pints and resins

2006-12-09 01:25:35 · 3 answers · asked by technofab90 2

as small as an insect that is approximately equal to one wavelength of the sound that the bat makes. If the bat emits a chirp at a frequency of 62.3 kHz, and the speed of sound in the air is 334 m/s, what is the smallest insect a bat can detect (ans in mm)???

2006-12-09 01:05:01 · 2 answers · asked by Mariska 2

2006-12-09 00:49:09 · 19 answers · asked by Aaron B 3

Three masses, M1= 2.5 kg, M2= 5.1 kg, and M3= 6.3 kg are made of the same material. They are on a horizontal surface and connected by massless strings. The system accelerates to the right at 2.37 m/s2 due to an external force F pulling on M3. Given that T1 is 10.61 N,
1- calculate the coefficient of kinetic friction mk.

my answer for this part is :
T1-f=M1*a
f=T-M1*a=10.61-(2.5*2.37)=4.685
N=M1*g=2.5*9.81=24.525
mk=f/N=4.685/24.525=0.191

2- Calculate the magnitude of the force F.
I'm not sure if my answer correct or not :

T2-T1=M2*a
T2=T1+M2*a=10.61+(5.1*2.37)=22.697N

F-T2=M3*a
F=M3*a+T2=(6.3*2.37)+22.697=37.628n

2006-12-09 00:42:34 · 1 answers · asked by YoraM 1

what will be observed???

2006-12-09 00:05:01 · 23 answers · asked by Als 2

A mass M is initially at rest on a horizontal surface,
מקדם החיכוך הסטטי(ms) =0.30 and מקדם החיכוך הקיניטי(mk)=0.20 .
A horizontal string then pulls M with a tension T.
Forces below are magnitudes.

Correct /Incorrect : If M does not accelerate, then T £ msN
Correct /Incorrect : M will accelerate if T exceed msN
Correct /Incorrect : N equals Mg
Correct /Incorrect : M will accelerate if T exceeds mkN
Correct /Incorrect :The NET force on M (if M does not move) is mkN
Correct /Incorrect : T equals msN if M remains at rest

2006-12-09 00:04:30 · 1 answers · asked by YoraM 1