Physics - October 2006

The reason I ask this is because the human brain operates by sending electrical impuses. So If the brain imagines something using many millions of electrical impulses at the same time then that must be fastert than light.

2006-10-31 23:46:32 · 27 answers · asked by Anonymous

2006-10-31 23:17:28 · 9 answers · asked by RYAN 3

I've read of a few experiments where they were successful in slowing light down, but I was wondering if the change in speed resulted in a proportionate change in force.

2006-10-31 23:08:48 · 2 answers · asked by nixkuroi 2

2006-10-31 23:04:46 · 9 answers · asked by abhishek j 1

a particle is acted upon by a force of constant magnatude which is always perpendicular to the velocity of the particle.the motion of the particle is in a plane.it follows that [1]velocity is constant[2]accelaration is constant[3]kinetic energy is constant

2006-10-31 22:58:58 · 6 answers · asked by NONAME 1

(Pressure reference level = 2 x 10~5 Nm per second)
the formula is spl= 20log(measured/ref)

(A) 12 dB?
(B) 6 dB?
(C) 3 dB?
(D) 60 dB?

2006-10-31 22:47:06 · 2 answers · asked by Anonymous

In Ray Optics.

2006-10-31 20:41:28 · 4 answers · asked by Kushal 1

2006-10-31 18:50:32 · 5 answers · asked by apologetickid 2

Why is the relativistic length contraction – as it appears in the Lorentz transformation – a function of the speed of light?

2006-10-31 18:38:43 · 2 answers · asked by quantum 1

2006-10-31 18:23:25 · 3 answers · asked by Anonymous

I applied to teach at some community colleges after I graduated but I didn't get hired. Probably because I'm not as experienced as most people who applied. I'm just looking for some job ideas. What is a good first job for a person who has a master's degree in physics? Any suggestions? If I don't find a job soon I will probably end up going back to school.

2006-10-31 18:20:01 · 5 answers · asked by Link 5

2006-10-31 17:44:47 · 6 answers · asked by einstein 1

2006-10-31 17:40:21 · 10 answers · asked by einstein 1

2006-10-31 17:32:46 · 5 answers · asked by Darren H 1

A 80 kg football player is stationary when a 100 kg linebacker hits him moving at 8 m/sec. After the collision, the linebacker is moving in the same direction at 1 m/sec. What is the speed of the first player after the collision? What percent of the energy is lost during the collision? Can you explain your answer?

2006-10-31 17:29:02 · 4 answers · asked by Anonymous

An amusement park ride consists of a large vertical cylinder that spins about its axis sufficiently fast that any person inside is held up against the wall when the floor drops away. The coefficient of static friction between person and wall is Mu(s) and the radius of the cylinder is R.

a) show that the maximum period of revolution necessary to keep the person form falling is T = (4pi^2RMu(s) / g)^1/2
b) Obtain a numerical value for T assuming that R = 4.00m and Mu(s) = 0.400. How many revolutions per minute does the cylinder make?

Buh? Help!

2006-10-31 17:19:17 · 1 answers · asked by andrew c 1

a rotating wheel requires 3.00 s to rotate 37.0 revolution. Its angular velocity at the end of the 3.00-s interval is 98.0 rad/s. What is the constant angular acceleration of the wheel?

this seems like it should be easy but i have no idea how to do this without the initial speed.

i know you guys can help

2006-10-31 16:56:47 · 2 answers · asked by nkarasch 2

the problem is:

find v=d/t and its uncertainty if d=5.10 +/- 0.01 and t=6.02 +/- 0.02

I know v is 0.847 but I can't figure out how to find the uncertainty.

there is a similar problem too:

Find P=IV if I=2.10 +/- 0.02 and V=1.02 +/- 0.01

Please help. I just need to know where to start with these problems...

2006-10-31 16:40:16 · 5 answers · asked by Anonymous

A car weighing 8600 N moves along a level highway witha speed of 83 km/h. The power of the engine at this speed is 67kW. The car encounters a hill inclined at an angle of 5.9 degrees with respect to the horizontal. If there is no change in the power of the engine, and no change in the resistive forces acting on the car, what is the new speed of the car on the hill? Answer in units of km/h, and show steps because i want to know how to do this for future use.

2006-10-31 16:25:57 · 1 answers · asked by scherdaddy 1

2006-10-31 16:11:16 · 11 answers · asked by Gayatri 2

1)Suppose a metal sphere is launched up a ramp [incline of 20 degrees] with Vi = 1.5 m/s. The end of the ramp is 1.20 m
above the floor. Calculate the range of the sphere.
2)Now suppose that the ramp is tilted downwards as shown below. Suppose that the sphere leaves the ramp at 1.5 m/s. The bottom of the ramp is 0.90 m above the floor. Calculate the range of the sphere.
1) the ramp rises up and the ball moves up
2) the ramp goes down and the ball moves downwards.

2006-10-31 16:03:55 · 4 answers · asked by Neo 2

What would the wavelenght of a microwave operating at 2.5 GHz with a power output of 500 W be?

I know that the wavelenght is c/f, and f = 1GHz is 10^9 Hz, therfore, 2.5 x10^9, but what would c=???

2006-10-31 15:49:35 · 2 answers · asked by Michelles W 1

what recommendation that it would like to tell us?

2006-10-31 15:49:23 · 4 answers · asked by sakura 1

1)Suppose a metal sphere is launched up a ramp [incline of 20 degrees] with Vi = 1.5 m/s. The end of the ramp is 1.20 m
above the floor. Calculate the range of the sphere.
2)Now suppose that the ramp is tilted downwards as shown below. Suppose that the sphere leaves the ramp at 1.5 m/s. The bottom of the ramp is 0.90 m above the floor. Calculate the range of the sphere.

2006-10-31 15:48:32 · 1 answers · asked by Neo 2

A. Be moving downward
B. Have a horizontal motion in additon to a verticle motion
C. Experience either an applied force or air resistance
D. Be changing its velocity
E. Have a constant speed
F. Be accelerating

2006-10-31 15:48:02 · 3 answers · asked by "G" 1

Br-

Ne-

Ne+

2006-10-31 15:44:19 · 1 answers · asked by Anonymous

Would the pointy end move through water faster or the rounded end?

2006-10-31 15:37:35 · 4 answers · asked by brett p 1

I know The Answer I just Wonder How many Others Know.

2006-10-31 15:25:22 · 9 answers · asked by Kuraimizu 3

2006-10-31 15:25:01 · 1 answers · asked by Anonymous

(continuation of question) electrons to form anions?

2006-10-31 15:24:03 · 7 answers · asked by Anonymous