Physics - September 2007

2007-09-05 08:17:13 · 3 answers · asked by Candy62 1

The figure below shows an electron entering a parallel-plate capacitor with a speed of v = 5.55 *10^6 m/s. The electric field of the capacitor has deflected the electron downward by a distance of d = 0.602 cm at the point where the electron exits the capacitor. (the length of the plate is 2.25cm)

(a) Find the magnitude of the electric field in the capacitor.
N/C
(b) Find the speed of the electron when it exits the capacitor.
m/s

2007-09-05 08:04:44 · 1 answers · asked by islandgrl 2

along a plank oriented at angle = 20.0° to the horizontal. How high above its original position is it raised?

2007-09-05 07:58:06 · 1 answers · asked by Wonder 2

An unexpected storm blows zeppelin the to a point 5000 km due east of its starting point.

How far must it now fly to reach its original destination?

2007-09-05 07:45:59 · 3 answers · asked by Alexander 6

An unexpected storm blows the ship to a point 5000 km due east of its starting point.

How far must it now sail to reach its original destination?

2007-09-05 07:37:21 · 6 answers · asked by Alexander 6

If so, what branch of science will it develop from? If not, is there any way we can explore beyond our solar system without this technology?

2007-09-05 07:32:07 · 11 answers · asked by Anonymous

I was just watching a movie called "What the Bleep do we Know?", and in it, they explain that the double slit produces an interference pattern, when they are performed normally. However, when we try to measure the position of the electrons, instead of an interference pattern, we just get two bands, corresponding to two slits. They further state that measurement by a conscious mind leads to this phenomenon.
Is this true? If yes, where can I know more about it? Is it the measurement that causes the interference pattern to change into two bands? Why is this so?

2007-09-05 07:23:48 · 4 answers · asked by Sarge 1

2007-09-05 06:57:51 · 8 answers · asked by Alexander 6

Two roads intersect at right angle.
First car is at intersection, driving North at speed 30mph
At this same moment the second car is 1000 feet away from the intersection, approaching from West at speed 40mph.

2007-09-05 06:25:35 · 7 answers · asked by Alexander 6

I would slso like to know where this dense mass of energy cam from and what surrounded the mass. Was it sitting in empty space?

I think that even if you got beyonfd the universe that you would still go on infinitely in to empty space. There may be no energy or mass, but you are not going to run in to a brick wall/

2007-09-05 06:10:13 · 9 answers · asked by Anonymous

does anyone know how to do this problem??

I have done the sketches, but I'm confused because it says to "show all work" and I can't really think of any way to do it accurately... I just guessed the general shapes of the graphs.

Please help if you have any idea!!

1. Imagine dropping a ball onto a hard floor so that it bounces straight up several times. Consider the time interval that the ball spends in contact with the floor to be of short duration but now zero.
a. sketch a position vs time graph for the motion for > 3 bounces. Assume that after each bounce the ball returns to a smaller maximum height. Take up to be the positive direction and the level of the floor to be zero height.
b. Directly below the graph from part (a) and using the same scale for the time axis, sketch a velocity vs time graph for the motion of the ball.
c. Directly below the graph for part (b) and using the same scale for the time axis, sketch an acceleration vs time graph for the motion of the ball.

2007-09-05 05:28:23 · 2 answers · asked by soliel021 3

2007-09-05 05:07:58 · 1 answers · asked by Anonymous

Also, what is the amount of time it takes for the acceleration?

2007-09-05 04:36:49 · 2 answers · asked by Anonymous

Falls resulting in hip fractures are a major cause of injury and even death to the elderly. Typically, the hip's speed at impact is about 2.0 m/s. I this can be reduced to 1.3 m/s or less, the hip will not fracture. One way to do the is by wearing elastic hip pads. (a) if a typical pad is 5.0 cm thick and compresses by 2.0 cm during the impact of a fall, what acceleration in m/s^2 and g's) does the hip undergo to reduce its speed to 1.3 m/s? (B) The acceleration you found in part (a) may seem like a rather large acceleration, but to fully assess its effects on the hip, calculate how long it lasts.

Please help me. I have been trying to work on this and just can't figure it out.

2007-09-05 04:24:56 · 3 answers · asked by Anonymous

It returns in 7 hours upstream the river.

The speed of river stream is 2mph.
The speed of the wind is 4mph.
What is the angle between the wind and the river?

2007-09-05 04:22:37 · 3 answers · asked by Alexander 6

I'm having some problems with this problem. Could someone please assist me? Thank you so much!

A dart gun is fired while being held horizontally at a height of .816 m above ground level, and at rest relative to the ground. The dart from the gun travels a horizontal distance of 7.65 m. A child holds the same gun in a horizontal position while sliding down a 45.8 degree incline at a constant speed of 1.94 m/s. The acceleration of gravity is 9.8 m/s^2.

What horizontal distance x will the dart travel if the child fires the gun forward when it is .539 m above the ground? Answer in units of m.

2007-09-05 04:00:12 · 2 answers · asked by sg88 1

Falls resulting in hip fractures are a major cause of injury and even death to the elderly. Typically, the hip's speed at impact is about 2.0 m/s. I this can be reduced to 1.3 m/s or less, the hip will not fracture. One way to do the is by wearing elastic hip pads. (a) if a typical pad is 5.0 cm thick and compresses by 2.0 cm during the impact of a fall, what acceleration in m/s^2 and g's) does the hip undergo to reduce its speed to 1.3 m/s? (B) The acceleration you found in part (a) may seem like a rather large acceleration, but to fully assess its effects on the hip, calculate how long it lasts.

2007-09-05 03:57:19 · 1 answers · asked by Anonymous

I'm really confused about this problem. I have broken it down into components (x, x initial, etc.), but I seem to not have enough info. If someone could please assist me, I would greatly appreciate it. Thanks!

A coyote is chasing a roadrunner. While running down the road, they come to a deep gorge, 15 m straight across and 110 m deep. The roadrunner launches itself across the gorge at a launch angle of 11 degrees above the horizontal, and lands with 2.5 m to spare. The acceleration of gravity is 9.81 m/s^2.

What was the roadrunner's launch speed? Ignore air resistance. Answer in units of m/s.

2007-09-05 03:54:37 · 3 answers · asked by sg88 1

Two straight railways converge to a level crossing at an angle α and two trains are moving towards the crossing with velocities u and v. If a and b are the intial distances of the trains from the crossing, show that their least distance apart will be:-
{(av-bu)sin α}/{(u^2+v^2-2uvcos α)^1/2}

2007-09-05 03:47:00 · 1 answers · asked by rock_bottom456 2

>continue>
600 volts line. find the change and the voltage of each capacitor

2007-09-05 03:28:34 · 1 answers · asked by carl y 1

2007-09-05 03:25:10 · 1 answers · asked by Deborah M 1

http://s223.photobucket.com/albums/dd78/floodtl/?action=view¤t=component.jpg

http://s223.photobucket.com/albums/dd78/floodtl/?action=view¤t=glowingpurple.jpg

2007-09-05 03:19:27 · 5 answers · asked by Anonymous

2007-09-05 03:02:09 · 19 answers · asked by Anonymous

i am doing an experiment

there are two sharp images formed at different distance

2007-09-05 02:44:39 · 1 answers · asked by Anonymous

I would just like to confirm if it is possible to convert waste heat energy to electricity... if possible, how?

plis, i rily nid help...

2007-09-05 01:52:47 · 3 answers · asked by blakken101 2

how is it work

2007-09-05 01:31:41 · 1 answers · asked by Anonymous

when you have a green light it makes the room appear green, and so on blue = blue........ so why dosnt a black light bulb make a room darker than the outside? this would be great for my afternoon sleeps! and yes i did paint a light bulb black. i dont get it.

2007-09-05 00:29:37 · 12 answers · asked by Anonymous

A gas undergoes a process that starts at a pressure of 25 psia and an initial volume of 4ft(cubed). Work is done on the gas in the amount of 12 Btu.

2007-09-05 00:24:58 · 2 answers · asked by Anonymous

how can you improve the output from a lemon battery? And how can I do a experiment to text it?

2007-09-04 23:54:02 · 5 answers · asked by jkwunan 1

A sample of 1.00 x 10^8 hydrogen atoms confined to a cubical volume of 1.00 x10^-9 m^3 and at a temperature of 2.00 x 10^-8 K mass of the hydrogen atom 1.673 x 10^-27Kg

Can someone explain what happens as the gas above is cooled to below the temperature where indistinguishability becomes important?

I think it is to do with the fact it is a fermion gas and it obey's the Pauli Exclusion Principle

2007-09-04 23:48:58 · 3 answers · asked by walt 2