Physics - January 2007

Picture the holding of the bike wheel while standing on the rotating platform scenario..... If you tilt the top of the wheel, you will be forced to the left or right... If you tilted the wheel to the left or right, would you feel an upward force or downward?

If so, why could you not build a levitating device using this technique?

2007-01-09 10:18:19 · 2 answers · asked by John R 2

yet, we normally don't sense electrical forces between us and our environment, while we do sense our gravitational interaction with the earth. why is this so?

2007-01-09 09:59:41 · 6 answers · asked by heelloo 1

Picture the holding of the bike wheel while standing on the rotating platform scenario..... If you tilt the top of the wheel, you will be forced to the left or right... If you tilted the wheel to the left or right, would you feel an upward force or downward?

If so, why could you not build a levitating device using this technique?

2007-01-09 09:56:42 · 2 answers · asked by John R 2

Does it offer any advantages? Or is it just different?

2007-01-09 09:41:58 · 12 answers · asked by sua428 2

2007-01-09 09:40:48 · 6 answers · asked by sua428 2

2007-01-09 09:34:12 · 2 answers · asked by skydiver 1

Specifically, if the objects were spheres of equal volume but of different mass so as to be as aerodynamic as possible and dropped from a height so terminal velocity can be reached. which object will hit the ground first?

2007-01-09 09:24:18 · 5 answers · asked by Anonymous

2007-01-09 09:22:44 · 6 answers · asked by DEXTER10 3

Consider the four charges in Figure P25.46 http://i137.photobucket.com/albums/q208/infinitbelt/p25-46.gif , in which d = 3 cm, q = 4 nC, the +x-axis points to the right, and the +y-axis points up. What is the force on the 1 nC charge at the bottom? Give your answer in component form, using i and j for and , respectively.

I am confused as how to start such problems. Any ideas?


Thanks!

2007-01-09 09:16:10 · 1 answers · asked by Anonymous

2007-01-09 09:07:02 · 4 answers · asked by lincolngomes301 2

Fruit blossoms are permanently damaged when the temperature drops below about -4 Celcius (a hard freeze). Orchard owners sometime spray a film of water over the blossoms to protect them when a hard freeze is expected. From hte point of view of phase changes, give a resason for the protection?

2007-01-09 09:01:55 · 2 answers · asked by bhangraking777 1

2007-01-09 08:45:47 · 4 answers · asked by **~~;BaByBoo~~** 1

Hi,

Consider the three charges in Figure P25.42 http://i137.photobucket.com/albums/q208/infinitbelt/p25-42.gif in which d = 4.8 cm, q = 8 nC, and the positive x-axis points to the right. What is the force on the 5 nC charge? Give your answer as a magnitude and a direction.

? N
? degrees counterclockwise from the positive x-axis


I tried doing F = (kq1q2)/r^2, but I keep getting 2.94 x 10^-4 N, but that is wrong. Any ideas?


Thanks

2007-01-09 08:11:49 · 2 answers · asked by Anonymous

2007-01-09 07:21:53 · 13 answers · asked by chris b 1

A.nearsightedness
B.farsightedness
C.chromatic aberration
D.spherical aberration

2007-01-09 07:18:35 · 2 answers · asked by Anonymous

2007-01-09 07:12:50 · 10 answers · asked by liz h 1

A charge of +q is located at the origin, while an identical charge is located on the x axis at x = 0.45 m. A third charge of +5 q is located on the x axis at such a place that the net electrostatic force on the charge at the origin doubles, its direction remaining unchanged. Where should the third charge be located?
x = ? m

2007-01-09 07:03:01 · 1 answers · asked by Jack W 1

Would the free body diagram for a "sinking anchor" be Force friction at the top and Force weight at the bottom?

2007-01-09 07:01:39 · 4 answers · asked by Bella J 1

2007-01-09 06:49:28 · 17 answers · asked by garden gal 2

When you approch the speed of light, when (percantage wise) will you be traveling twice that of Earth year. AKA one year going that speed would be two years on Earth.

2007-01-09 06:44:35 · 3 answers · asked by sammalmsteen 2

Light in a standard quantum model ie. an `infinite well' could well be considered as a standard frequency which is resonating under its natural frequency within the well.

2007-01-09 06:43:54 · 5 answers · asked by 007 Sentinel 1

for a science work sheet plz help

2007-01-09 06:34:19 · 14 answers · asked by hnxmn 1

if i crop a 1.66:1 into a 1.33:1 then try to crop that image into a 1.85:1 which would be closest to the original aspect ratio the 1.85:1 or the 1.33:1?

2007-01-09 06:30:42 · 1 answers · asked by Anonymous

2007-01-09 06:23:05 · 9 answers · asked by aos474 1

A crate weighing 850 N is pushed up an inclined plane a distance of 10.0 m. The plane makes an angle of 15.0 degrees with the horizontal and the crate moves with constant velocity. The coefficient of friction between the crate and the plane is 0.24. Calculate the work that is done in pushing the crate.
so....
Given: mass=850 N ,D=10.0 m , angle= 15.0 degrees , coefficient of friction= 0.24
Need to find= work?
Useful equations= work=horizontal force *distance
w=Fh*D
Fh=coefficient of friction *mg
mass *acceleration due to gravity
here mg=850 N
Fn=mgcos(15) degrees
Fh=mgsin(15) degrees

I know the answer is 4.2*10^3 J but im confused how to get it.

2007-01-09 06:16:18 · 4 answers · asked by dreamz 4

2007-01-09 06:07:48 · 28 answers · asked by Anonymous

dementionaly what is theuniverse made from?

2007-01-09 06:04:41 · 2 answers · asked by Frances D 1

A girl pulls a wagon with constant velocity along a level path for a distance of 45 m. The handle of the wagon makes an angle of 20.0 degrees with the horizontal and she exerts a force of 85 N on the handle. Find the amount of work the girl does in pulling the wagon?

I know the answer should be 3.6*10^3 J but i dont know how to get this, please help.

2007-01-09 06:04:28 · 2 answers · asked by dreamz 4

2007-01-09 06:02:20 · 20 answers · asked by ndlovu55 1

If a person traveled by car from Lubbock to Midland to San Angelo and back to Lubbock what was the average velocity?
0 because the net displacement is 0
70 mph, because that is the legal speed limit
112.7 km/hr, the legal speed limit in km/hr
There is not enough information given

2007-01-09 05:55:33 · 6 answers · asked by star wars freak 2