Physics - March 2007

I am just curious!

2007-03-03 08:21:27 · 4 answers · asked by joelkillion 1

Problem 1:
http://img480.imageshack.us/img480/8757/problemanglezj1.gif
I got the first part of this question right which is 7.05666593e-11.But im doing something wrong in calculating the angle.
Fy= G(1.5)(3.5)/2.3^2 = 6.621e-11
Fx= G(1.5)(4.3)/4.2^2 = 2.43959e-11
so the angle is tan-1(fy/fx) = 1.217796181 degrees? but thats wrong :(

Problem 2:
http://img231.imageshack.us/img231/2783/1e1nne1.gif

2007-03-03 07:51:17 · 2 answers · asked by sotkinghunter 1

In relativity, as speeds increase for something, time slows down for that something. Something needs energy in order to accelerate to any speed. Is there an equation showing the relationship between energy, and the amount TIME has changed, in this instance of relativity?

2007-03-03 07:50:30 · 1 answers · asked by psilocyphener 3

The US is selecting a new design to modernize its nuclear weapons, according to the NY Times, and it refers to the design as a hybrid, a cross between the two weapons labs' approaches. What's tthe difference between this design and the older design, and what makes it more reliable, more secure, etc?

2007-03-03 07:24:06 · 2 answers · asked by Mark W 1

2007-03-03 06:38:54 · 15 answers · asked by Ken G 1

No recorded mutations have ever caused anything new or good? Only diseases and bad things? Explosions (big bang) have never caused more order, only destruction. How did living organisms come from non-living oganisms? If the universe is winding to an end, what was it's beginning?

2007-03-03 06:37:17 · 7 answers · asked by Anonymous

From what i understood in class, average speed and average velocity are the same, but average velocity must be + or -. Is that true? Also, Average velocity, isn't it the same as velocity, displacement/time?

If what i'm saying is right, then
Vaverage = (0m-30m)/(15.8sec-9.23sec) = -4.57 m/s, but Speed (avg) = 4.57 m/s

Is that right?

2007-03-03 05:57:31 · 6 answers · asked by stepanstas 2

Two cars, car(1) with 1466 kg mass and a velocity of 10.56 m/s and car(2) with 2000 kg mass and unknown velocity approach an intersection at 90o with respect to each other and collide. Immediately after the collision the cars slide stuck together with a velocity of 16.34 m/s. What is the angle between the momentum of the car wreck and the initial direction of car (1).

The answer is 74.1364 but how do u get the answer?, please show formula used

2007-03-03 05:51:01 · 2 answers · asked by Paul S 2

2007-03-03 05:43:33 · 1 answers · asked by Tom C 2

I'm making a small electric car for a speed competition and a pulling competition. I have 2 big gears, 2 smaller gears, and a belt to connect them. For the speed competition I'm using a big gear connected to my motor and a small gear connected to my axle. For the pulling competition should I use 2 big gears, or a small gear connected to the motor and a big gear to the axle.

2007-03-03 05:35:26 · 1 answers · asked by invincible 3

all sounds omitt a wave..some sounds we cant hear (microwaves) the question is..are thoughts actually a sound?if it is.then ther must be a wave...i wonder what that frequency would be..can it be tapped and the volume turned up so that one may hear thought? just asking

2007-03-03 05:14:32 · 4 answers · asked by Lost Boy 2

It's for science i i just don't get it!

2007-03-03 05:03:36 · 4 answers · asked by pink_butterfly 2

What value of electric field could make their paths straight? V/m?

2007-03-03 05:01:47 · 1 answers · asked by Jade m 1

Calculate the magnitude of the field inside near the center. T


I would be VERY greatful for help w/ this!

2007-03-03 04:50:48 · 2 answers · asked by Jade m 1

I am doing coursework on ohms' law and need help

2007-03-03 04:35:13 · 12 answers · asked by Anonymous

2007-03-03 04:26:35 · 4 answers · asked by Anonymous

how can you demonstrate a project on the question... Why do unanimated optical illusions appear to move?

2007-03-03 04:25:36 · 1 answers · asked by Anonymous

well actually it's imp question and in my syllabus for my exams. Thx anyway ppl:). please list a link or any related information. THX!:)

2007-03-03 03:58:17 · 4 answers · asked by Zenews Labrint 3

A train traveling at a constant speed rounds a curve of radius 200 m. A chandelier suspended from the ceiling swings out to an angle of 16.5° throughout the turn. What is the speed of the train?

2007-03-03 03:51:28 · 2 answers · asked by Anonymous

1. If Earth pulls you down, then according to Newton's third law, you pull Earth up. Is this possible? (Remember that F=ma for each object.)
2. When you are standing on the floor, you push down on the floor and the floor pushes back on you. Why doesn't the floor make you rise up?

2007-03-03 03:44:43 · 4 answers · asked by Anonymous

Someone explain it to me in simple form please...but still in detail

2007-03-03 03:37:57 · 6 answers · asked by Anonymous

A. 2.0 x10-2 kg
B. 5.4 x10-9 kg
C. 6.7 x10-3 kg
D. 6.7 x10-11 kg

2007-03-03 03:17:34 · 3 answers · asked by Anonymous

1. electromagnetic wave direction: -y
momentary electromagnetic field direction: -x
then momentary magnetic field direction = -z
2. EM wave: +y
EM field: -x
M field= +z
3. EM wave: -y
EM field: +x
M field= +z

2007-03-03 03:16:49 · 1 answers · asked by Ting 4

Can anybody explain this in simple terms?

2007-03-03 03:05:12 · 2 answers · asked by Padmini Gopalan 4

2007-03-03 02:59:25 · 10 answers · asked by Chad H 2

2007-03-03 02:56:44 · 2 answers · asked by maruthu m 1

If the kick lasts 0.01 s, the ball flies off with what speed?

A. 0.023 m/s
B. 2.3 m/s
C. 0.23 m/s
D. 23 m/s

2007-03-03 02:26:00 · 6 answers · asked by Anonymous

Q: An electromagnetic wave propagates in the -y direction. The electric field at a point in space is momentarily orientated in the +x direction. What is the direction of the magnetic field momentarily orientated at that point?
A: +z direction
how do you know this?

2007-03-03 01:56:06 · 5 answers · asked by Ting 4

a uniform rod AB of mass M and length L rest on smooth plane. an impulse P is applied to the end B the time taken by the rod to turn to through right angle is

2007-03-03 00:21:58 · 1 answers · asked by chotu 1

system about an axis passing through o prpedicular to the plane of frame is?

2007-03-03 00:16:35 · 1 answers · asked by chotu 1