Physics - December 2006

2006-12-06 16:59:24 · 2 answers · asked by vijay p 1

give me a answers in detail with illustration ,if it is in dental related that will be more helpfull

2006-12-06 16:53:32 · 1 answers · asked by drssureshraja 1

A child in an airport is able to cover 294 meters in 3 minutes running at a steady speed down a moving sidewalk in the direction of the sidewalk’s motion. Running at the same speed in the direction of the opposite to the sidewalk’s movement, the child is able to cover 240 meters in 5 minutes. What is the child’s running speed on a still sidewalk, and what is the speed of the moving sidewalk?

2006-12-06 16:22:34 · 7 answers · asked by Ken H 1

2006-12-06 16:00:00 · 2 answers · asked by Habt our quell 4

ive been sick for a couple days and missed school.this isnt a assighment so im not cheating,but i need to study for my test i hav tomorrow! those are the two questions i have when im studying. help!!!!!!!!!!

2006-12-06 15:50:06 · 4 answers · asked by gcoco 1

2006-12-06 15:44:23 · 4 answers · asked by venkey30 2

The x- and y-components of a velocity vector of 100 N at 240 degrees would be what?
I know it is
50 N, 86.6 N but I am not sure where to put the negative and positive signs. Thanks for your help and explaination.

2006-12-06 15:42:49 · 1 answers · asked by rcpaden 5

I need a science fair project idea please.
It has to do with Physical science, or chemistry and cna it be orginal. I need high middle school and low high school idea thank you.
Also it needs to be kind of like
"how does______affect______?"
ex how does a bana affect the space around it :P
thank you !

2006-12-06 15:31:10 · 7 answers · asked by Ryan C 1

2006-12-06 15:23:18 · 1 answers · asked by bujju 1

2006-12-06 14:31:54 · 3 answers · asked by summer_girl1404 2

how come sometimes tension is said to be "in both directions", but if you stick a cable horizontally from a wall and hang a mass from the end, the tension is towards the wall? shouldn't there never be any net tension, and if so, why does the value factor in during calculations of other forces??

2006-12-06 14:28:57 · 1 answers · asked by need help! 3

I've been told that a property of waves is that when two waves of the same frequency meet, they can either interfere constructively or destructively, depending on how much they are in phase with each other. However, in band, it doesn't matter how far apart they are, or where you, the listener are, if 10 trumpets play together at the same note, then they will always sound louder. It seems logically that if each instrument was creating individual alternating high and low pressure zones, then entropy would never allow those to all lign up perfectly, and eventually all those vibrations, if you had enough instruments, would just interfere so much that you were left with just regular air. But this never happens, the instruments always sound louder.

2006-12-06 13:51:58 · 9 answers · asked by Curious George 1

I have researched this question, and all that my sources tell me is that that area has the perfect conditions to create ozone. But, once the ozone is made, it seems that it would expand and disperse itself throughout the atmosphere rather then remain in such a small area.

2006-12-06 13:47:15 · 4 answers · asked by Curious George 1

2006-12-06 13:42:06 · 4 answers · asked by maivas229 5

The force of gravity accelerates the mass 'm'. There is a critical height where mass 'm' flies off. How fast is it going, using only R, h and gravity = 9.81 m/s^2? Here is the picture you will need to use for the problem: http://session.masteringphysics.com/problemAsset/1011090/26/MWE_we_9.jpg

2006-12-06 13:40:17 · 1 answers · asked by Jen 2

I'm trying a project that if I can give myself a little extra "charge" will I be more awake in the morning.

2006-12-06 13:33:23 · 5 answers · asked by Anonymous

2006-12-06 13:27:09 · 15 answers · asked by Anonymous

Could you also explain what matter is in laymen terms or in other words dumb it down or say it in a way I can understand.

2006-12-06 13:21:16 · 13 answers · asked by Anonymous

simple 8th grade science here, nothing specific

2006-12-06 13:19:22 · 6 answers · asked by Anonymous

2006-12-06 13:11:57 · 4 answers · asked by Anonymous

It starts from rest and travels 40 m in 3 seconds. I know accel = v-vo/time. But I don't get how to get that stuff. So how would I find accel and velocity and vo from this info

2006-12-06 13:11:52 · 3 answers · asked by w_xsoadx_w 2

dense plastic toy of mass 3kg is floating just beneath the surface of a pond. What is the buoyant force on it?

2006-12-06 13:11:33 · 2 answers · asked by El 1 1

water holding tank= 100mx45mx10
mercury has been found in the tank with a concentration of 60m/L.
What is the total mas of mercury in the tank?

2006-12-06 13:10:08 · 3 answers · asked by El 1 1

im doing a project that deals with the light spectrum-- i would like to know if theres a way to see invisable light using emitting and detecting diodes to show that this certain light exists even tho its not visable to the human eye-- but can be detected using electronic circuits on a circuit board-- thanks

2006-12-06 13:07:13 · 10 answers · asked by james_a_willis 3

A lumberjack (mass = 98 kg) is standing at rest on one end of a floating log (mass = 280 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +2.8 m/s relative to the shore, and then hops onto an identical floating log that is initially at rest. Neglect any friction and resistance between the logs and the water.
(a) What is the velocity of the first log just before the lumberjack jumps off? (Indicate the direction of the velocity by the sign of your answers.)
in m/s
(b) Determine the velocity of the second log if the lumberjack comes to rest on it.
in m/s

2006-12-06 13:04:57 · 5 answers · asked by Anonymous

i need to kow how to find acceleration and final velocity ASAP

2006-12-06 13:03:23 · 2 answers · asked by Someone in gresham 1

i need 4 uses of radiowaves, how the wave works, is it harmful and why is it harmful. thank you.

2006-12-06 12:55:43 · 4 answers · asked by . 1

assuming the initial speed is 20m/s and acceleration 10m/s^2

2006-12-06 12:55:38 · 5 answers · asked by Anonymous

You are boating on a river that flows toward the east. Because of your knowledge of physics, you head your boat 53 degrees west of north and have a velocity of 6.0 m/s due north relative to the shore.

a. What is the velocity of the current?

b. What is the speed of your boat relative to the water?

Please help me with this problem.
I'm having trouble understanding it.

I'm having a hard time creating the triangle for this problem.
Please help.

2006-12-06 12:46:20 · 2 answers · asked by swimmertommy 1

Catching a wave, a 72kg surfer starts with a speed of 1.3m/s, drops through a height of 1.75m, and ends with a speed of 8.2m/s. How much nonconservative work was done on the surfer?

2006-12-06 12:44:40 · 2 answers · asked by Anonymous