Physics - January 2007

2007-01-22 11:40:33 · 5 answers · asked by Anonymous

2007-01-22 11:38:42 · 2 answers · asked by Yay Area 5

using one of those red light laser pointers

2007-01-22 11:34:31 · 3 answers · asked by zahara 1

timbre describes the loudness of a sound you hear

2007-01-22 11:32:01 · 3 answers · asked by crayon43 1

interference occurs when two or more sound waves interact

2007-01-22 11:30:53 · 2 answers · asked by Anonymous

2007-01-22 11:30:15 · 4 answers · asked by Anonymous

It's my perception that gravity can only act on objects with mass correct? Then how does a massless substance such as light and other EW's bend in the presence of strong gravitational forces such as black holes.

2007-01-22 11:24:27 · 4 answers · asked by pezeveng3319 2

Hi,

I am stumped on this question and wish to get some guidance:

You are helping to design an electron microscope. A new device to position the electron beam is a charged circle of conducting material, divided into two half circles separated by a thin insulator; one half can have a + charge and the other a - charge. The electron beam will go through the center of the circle, and your job is to calculate the electric field in the center of the circle as a function of the amount of positive charge on one half circle, the amount of negative charge on the other, and the radius of the circle. Use integration.

I am confused where to begin. I am guessing I will have to use E = (kq) / r^2 somewhere. Any ideas?


Thank you!

2007-01-22 11:22:34 · 2 answers · asked by Anonymous

2007-01-22 11:12:21 · 2 answers · asked by tweety 1

2007-01-22 11:11:38 · 12 answers · asked by cody p. 1

A rolling ball has an initial velocity of -1.5 m/s. If the ball has a constant acceleration of -0.23 m/s^2, what is its velocity after 2.2s?
What is the average velocity during the time interval? How far did it travel in this time interval?
Please let me know how to get the answers to these. I need to learn. Thank you.

2007-01-22 10:50:44 · 4 answers · asked by rcpaden 5

physics

2007-01-22 10:42:08 · 5 answers · asked by Anonymous

2007-01-22 10:17:40 · 4 answers · asked by Molly S 1

okay i have an assigment where i have to list 8 items from home that have electromagnetic or mechanial waves and i already have tv,microwave,and ipod if you know of another one please tell me and if you can have a link so i can justify it and remember something from home so no x-rays and stuff like that. thank you

2007-01-22 10:01:26 · 1 answers · asked by Anonymous

2007-01-22 09:59:27 · 3 answers · asked by damigurl05 1

I really need some help!

2007-01-22 09:53:09 · 5 answers · asked by blueteeth0095 2

I've seen various shows on researchers looking into gyroscopes as a means of propulsion. Does this really work? Has anyone actually built a device that is propelled by processional motion?

2007-01-22 09:43:45 · 3 answers · asked by Kender_fury 3

PLEASE!!!!!! HELP!!!!!!!!

2007-01-22 09:34:44 · 3 answers · asked by Anonymous

if im pushing my sister ona swing and in 1.5 min i make 45 pushes. what is the frequency.

would the frequencey just be .5 hertz

2007-01-22 09:23:30 · 2 answers · asked by El 1 1

2007-01-22 09:01:24 · 2 answers · asked by cuteomi94 1

2007-01-22 08:54:05 · 5 answers · asked by Anonymous

Okay, imagine this situation. One day, a man invents a time machine, goes back in time to the time of his parents and murders his mother. Because his mother dies, he isn't born, so he ceases to exist. But when he ceases to exist, his mother is never killed, and so he is born again, to kill his mother, and not to at the same time.

What do you think would be the result? Would this be an infinite time loop? Would going back in time in the first place cause an infinite time loop?

I've thought up the theory that every change you make in the past doesn't affect the present and future, because it technically already happened. But this kind of paradox just won't be solved. Help me!

2007-01-22 08:37:11 · 9 answers · asked by Anonymous

2007-01-22 08:32:44 · 3 answers · asked by Anonymous

2007-01-22 08:18:49 · 4 answers · asked by Anonymous

Better to find out now, than to have a "whoops" moment later

2007-01-22 08:15:59 · 5 answers · asked by Anonymous

along with any scientific awnsers, to simplify are black and white colors? my view:black is not a clolor for it is void of light true black doesnt allow the light to reflect back absorbing it all and white is nutreal colour being just that nothing more than light reflecting stright back , what is the real awnser here?

2007-01-22 07:24:11 · 4 answers · asked by Anonymous

How does the length of wire affect resistance. Please explain well [while being scientific].

2007-01-22 07:23:59 · 7 answers · asked by mbchelsea 1

I heard that any open flame emits potentialy harmful radiation. Is it the case for a candle's open flame?
What i want to ask exactly is "Would staring into the open flame of a candle for prolonged periods of time harm me in any way?"

2007-01-22 07:23:38 · 6 answers · asked by Anonymous

2007-01-22 06:54:37 · 7 answers · asked by joshorty35 1

Gravity does work. It holds the moon in orbit and this requires energy to produce the work.

2007-01-22 06:36:38 · 6 answers · asked by Paul R 1