Physics - November 2007

2007-11-23 18:42:08 · 5 answers · asked by Anonymous

Also, what is meant by frequency of alternating current?

2007-11-23 18:15:32 · 8 answers · asked by Akilesh - Internet Undertaker 7

2007-11-23 18:05:02 · 7 answers · asked by macon 1

2007-11-23 18:01:01 · 2 answers · asked by Anonymous

I'm doing a project for physics and I want to talk about color blindness. I need to find out how the glasses are made,or I need to find some drawings of them ( how they change the spectrum of colors ). I found a website '' http://www.linkgrinder.com/Patents/Method_for_desi_7284856.html '' and at the end it explains something by pictures ....I can't find any picture there, if you can find some, please tell me.

Thanks

2007-11-23 17:37:08 · 2 answers · asked by Gabriela I 1

PLEASE EXPLAIN BRIEFLY AND LABEL ANSWERS!

At the instant a traffic light turns green, a car starts from rest and accelerates uniformly at a rate of 4.0 metres/second^2 [E]. At the same instant, a truck travelling with a constant velocity of 90.0 km/hour [E] overtakes and passes the car.

a) How far beyond the starting point is the car after 10.0 seconds?

b) How far beyond the starting point is the truck after 10.0 seconds?

c) The car passes the truck at a distance of 312.5 metres beyond the starting point. How fast is the car travelling at this instant?

d) How long does the car take to pass the truck?

e) Both drivers suddenly see a barrier 100.0 metres away and hit their brakes at exactly the same time. Assuming that both vehicles decelerate uniformly, and they take 3.0 seconds to stop, will they stop in time?

2007-11-23 16:25:07 · 3 answers · asked by Deloris 1

on thermal conduction with special emphasis.

2007-11-23 16:07:48 · 5 answers · asked by Tsubasa J 1

three blocks are attached by cords that loop over frictionless pulleys. Block B lies on a frictionless table; block A hangs to the left side of the table and block C hangs to the right side. the masses are mA = 5.40 kg, mB = 8.00 kg, mC = 14.5 kg. When the blocks are released, what is the tension in the cord at the right?

2007-11-23 15:43:46 · 2 answers · asked by Anonymous

Consider a linear array of n = 10 identical blocks all initially at rest on a frictionless horizontal tabletop. The blocks are labeled 1 through "n", reading from left to right. The block all the way on the left (#1) is pushed to the right so that it has a speed of v = 15 m/s before colliding into the block immediately to its right (#2). After this #2 collides into #3, #3 collides into #4, and so on. Determine the speed of the right most block (#n) when it finally starts moving. Assume that the coefficient of restitution between each block is E = 0.72.

2007-11-23 15:35:05 · 1 answers · asked by jerseyshore man 2

and ironicaly I don't meant ionicly.

2007-11-23 15:26:56 · 12 answers · asked by magnetic__reversal 2

REST OF THE PROBLEM...
20.0-kg gold bar at 25.0C is placed in large, insulated 0.800-kg glass container at 15.0C and 2.00 kg of water 25.0C. Calculated and final equilibrium temperature.
The book have an answer of 26.0C
PLEASE HELP ME I HAVE DONE THIS PROBLEM THREE TIME AND STILL DON'T UNDERSTAND HOW THIS ANSWER CAME ABOUT, PLEASE SHOW ME THANK YOU

2007-11-23 14:06:27 · 3 answers · asked by markeesha h 1

2007-11-23 13:44:08 · 3 answers · asked by Anonymous

2007-11-23 13:14:45 · 4 answers · asked by Anonymous

Explain how this can be true.

2007-11-23 13:01:51 · 6 answers · asked by Anonymous

Which of the following are made up of particles identical to electrons?
a. alpha rays c. gamma rays
b. beta rays d. more than one response is correct

2007-11-23 12:50:16 · 2 answers · asked by Anonymous

2007-11-23 12:46:12 · 3 answers · asked by Anonymous

If you were in a satellite orbiting the Earth, how might you cope with walking, drinking, or putting a pair of scissors on a table? Explain.

This is a question from ch. 6 of a physics textbook on law of universal gravitation, Kepler's laws of planetary motion, gravitational field. Please help! All answers are greatly appreciated, thank you!

2007-11-23 12:24:53 · 3 answers · asked by Kiwikahuna 2

Astronauts who spend long periods in outer space could be adversely affected by weightlessness. One way to stimulate gravity is to shape the spaceship like a bicycle wheel that rotates about an axis just like a wheel, with the astronauts walking on the inside of the "tire."
Consider a) how objects fall
b) the force we feel on our feet
c) any other aspects of gravity you can think of.

This is a question from ch. 5 of a physics textbook covering normal force, kinetic/static friction. Any and all help will be greatly appreciated! Thank you!

2007-11-23 12:20:42 · 2 answers · asked by Kiwikahuna 2

speed equal to magnitide

2007-11-23 09:18:43 · 2 answers · asked by Anonymous

2007-11-23 09:18:28 · 3 answers · asked by Anonymous

scalars & vectors and Kinematics

2007-11-23 09:17:27 · 3 answers · asked by Anonymous

for a standing wave on a string fixed at both ends and of length L, what is the max length possible?

im completly confused :S

2007-11-23 08:20:27 · 7 answers · asked by Anonymous

Help.

2007-11-23 07:19:45 · 1 answers · asked by Anonymous

2007-11-23 07:18:40 · 2 answers · asked by Anonymous

Do people steal stuff from stores by throwing items over them ?

2007-11-23 07:00:06 · 4 answers · asked by mister? 1

A body stands on a ramp of height h. After getting a small push, the body slides down. The friction is absent. Potential energy of the body mgh is transformed into kinetic energy of mv^2/2. Consider the same process in the inertial coordinate frame, moving with velocity v=√ 2gh. Initial energy of the body is mgh + mv^2/2, and its final energy is zero.

What happenes with the energy conservation law?

2007-11-23 06:44:03 · 5 answers · asked by Zo Maar 5

Can Someone give me a list of unbalancing forces and explain what an unbalancing force is..

2007-11-23 06:38:13 · 4 answers · asked by Anonymous

If r=2m and v=7m/s when the floor drops away, what is the minimum coefficient of friction?


when i tryed this problem i got .1 but i think it is wrong because i dont know how to work out the problem

2007-11-23 06:19:08 · 1 answers · asked by the_hockey_guy1990 1

2007-11-23 06:09:49 · 7 answers · asked by Anonymous

how do you write resolution, e.g. per cm or something like that and what do you do to obtain this answer

also how do you write a ratio for two resolutions of two images

2007-11-23 06:03:49 · 2 answers · asked by Anonymous