Physics - January 2007

2007-01-24 13:55:50 · 3 answers · asked by Dirck G 1

What if light is nothing more than a wave that when it comes in contact with photons it activates the photons?

In another aspect, could it mean the wave might be pushing photons which is what gives the light we see?

2007-01-24 13:54:09 · 4 answers · asked by Anonymous

2007-01-24 13:34:00 · 5 answers · asked by Dirck G 1

a woman runs arounds 600m track 6times in 17min10sec
calculate
a.) her speed in m/s
b.) her velocity in m/s

2007-01-24 13:30:28 · 3 answers · asked by Anonymous

The only way I can concieve of testing out a theory of light having mass is by building a very long tunnel under the Earth's crust. After the tunnel is built, many sensors would be put in the long tunnel to measure a laser from one end of the tunnel to the other end. The sensors would then be able to pick up whether or not the laser bent from the Earth's gravity. Even if it showed a .0000000001... bend, wouldn't this be theoretical proof that light does have mass?

2007-01-24 13:26:36 · 12 answers · asked by Anonymous

a source or article ont his would be nice

2007-01-24 13:25:17 · 9 answers · asked by Bao Wow 3

2007-01-24 13:24:18 · 2 answers · asked by beast 1

As the drops fall, they

a. remain at a relatively fixed distance from each other
b. get farther apart
c. get closer together

What part of physics explains this happening?

2007-01-24 12:45:32 · 3 answers · asked by Anonymous

2007-01-24 12:37:46 · 4 answers · asked by darylnisha i 1

When we are in the plane and the airplane is turning/tilting so it's wings are diagonal, why is it we can't feel it from our seats inside the plane??!

2007-01-24 12:31:37 · 20 answers · asked by dragsss 1

2007-01-24 12:25:21 · 7 answers · asked by spam 1

E.g. if a photon is emitted by a positive charge towards a negative charge, shouldn't the negative charge move away from the positive charge to conserve momentum? I've heard that force carriers should simply be thought of as "messenger" particles, but that sounds like hand-waving to me.

2007-01-24 12:20:21 · 3 answers · asked by Anonymous

Instead of parallel universes such as (||) maybe serial (--) in which the universes are the same matter yet in different points of time?

2007-01-24 11:51:57 · 2 answers · asked by Researcher of Knowledge 1

2007-01-24 11:28:38 · 15 answers · asked by Anonymous

I got .314 for part A but I'm being told it's wrong. I know that the answer for part A has to be closer to 0 than 3. I know I need to set the Electric field to 0, but after that, I'm at a lost for what to plug in.

Two charges, -20 and +4.2 µC, are fixed in place on the x axis at x = 3.0 m and x = 0 m, respectively.
(a) At what spot along the x axis is the net electric field zero?
x = m
(b) What would be the force on a charge of +19 µC placed at this spot?
N

2007-01-24 11:20:53 · 2 answers · asked by Confused 1

A falling object experiences a)__________ (which is independent of b)_________) due to c)_________ which is balanced by d)__________ which is a form of e)___________.

2007-01-24 11:12:32 · 3 answers · asked by Anonymous

Imagine that you are on a spaceship that is far from the sun or any planet. Explain why a 500 kg piece of equipment would be difficult to move, even though the object would be "weightless"?

2007-01-24 11:05:23 · 3 answers · asked by Anonymous

Write expressions for the electric field E inside (rR) the sphere. Also indicate the direction of the field.

What would a graph of the field strength as a function of r look like?

2007-01-24 10:50:31 · 2 answers · asked by Anonymous

Which object has more momentum in each of the following?
a. a car and a train with the same velocity
b. a moving ball and a still bat
c. two identical balls moving with the same speed in the same direction
d. two identical balls moving at the same speed in opposite directions

2007-01-24 10:43:47 · 7 answers · asked by Anonymous

A ferris whell with a radius of 9.5m rotates at a constant rate, copmpleting one revolution every 32 s. What is the direction and magnitude of a passegner's acceleration when (a) at the top and (b) at the bottom.

2007-01-24 10:19:11 · 2 answers · asked by bluevolleyball12 1

What would the equation be to determine the acceleration of air entering a cyclone? If possible i would like to also know how different air pressures relates to that acceleration. So, say the air pressure entering is 1 atm, and the cyclone is a vaccume. How would the acceleration and pressure of the air entering change?

2007-01-24 10:12:15 · 1 answers · asked by Anonymous

A typical atom has a diameter of about 1.0 X10^-10 m.

(a) What is this in inches?
_______________in.
(b) How many atoms are there along a 11.0 cm line?
________________atoms

2007-01-24 10:09:47 · 2 answers · asked by Jessie L 2

What is the percent uncertainty in the measurement 3.86 +/- (that would plus or minus) 0.15 m?

Answer should be in percent.

2007-01-24 10:06:43 · 1 answers · asked by Jessie L 2

2007-01-24 09:44:35 · 4 answers · asked by Anonymous

a. expand
b. contract
c. boil
d. melt

which one??

2007-01-24 09:29:57 · 5 answers · asked by illdaretofly 2

2007-01-24 09:13:09 · 4 answers · asked by Anonymous

a.)75 b.)7500 c.)750,000 d.)75 million e.)750 million ????

2007-01-24 09:04:33 · 4 answers · asked by rcastrojt 1

a) the mass of the milk
b) the volume of the milk
c) tell me one likely source of error in these measurements

2007-01-24 09:00:05 · 3 answers · asked by Anonymous

does cold draw heat or visa versa?

2007-01-24 08:59:47 · 14 answers · asked by obewan 1

1. A motorcycle has a constant speed of 24.0 m/s as it passes over the top of a hill whose radius of curvature is 118 m. The mass of the motorcycle and driver is 337 kg. Find the magnitude of
(a) the centripetal force and
N
(b) the normal force that acts on the cycle.
N
------------------------------...
2. A bullet is fired from a rifle that is held 2.0 m above the ground in a horizontal position. The initial speed of the bullet is 1270 m/s. Find
(a) the time it takes for the bullet to strike the ground and
s
(b) the horizontal distance traveled by the bullet.
m
------------------------------...
3. A satellite has a mass of 5600 kg and is in a circular orbit 4.0 105 m above the surface of a planet. The period of the orbit is two hours. The radius of the planet is 4.10 106 m. What is the true weight of the satellite in orbit?
N

2007-01-24 08:56:44 · 2 answers · asked by ckielblock18 1