Physics - February 2007

In our everyday environment, diffraction is much more evident for sound waves than for light waves. Why is this so?

2007-02-04 04:41:33 · 1 answers · asked by Anonymous

2007-02-04 04:22:55 · 4 answers · asked by Isra 1

A 4280 ki car is moving at 40km/hr. What is it's momentum?

How do I answer and how do I solve the problem.

2007-02-04 03:56:52 · 3 answers · asked by I<3Twilight 2

Series circuit 12 V Battery connected to two equal bulbs each with a resistance of 60 ohms.

2007-02-04 03:45:04 · 5 answers · asked by Anonymous

A 182.0-g china serving bowl is warmed 55.1 C when it absorbs 3.0 kcal of heat from a serving of hot food. What is the specific heat of the china dish? _____kcal/kg C

2007-02-04 03:29:08 · 5 answers · asked by Hey ;) 3

A 136.4-g sample of water at 21.1 C is heated to steam at 125.4 C. How much heat was absorbed? ____kcal

2007-02-04 03:26:40 · 3 answers · asked by Hey ;) 3

How much heat is required to change 261.2 g if ice at 0 degrees C to water at 0 degrees C

2007-02-04 03:25:19 · 2 answers · asked by Hey ;) 3

Sometimes sky also appears red, yellow, orrange, pale purple, reddish brown, even pale purple colour. Why?
Why also the clouds look white? I suppose it shows transparent or pale blue color.

2007-02-04 03:07:34 · 12 answers · asked by li mei 3

When you breath in helium it makes your voice go higher and I want to know why.

2007-02-04 02:55:23 · 7 answers · asked by lil_drummer_girl_83 2

1)JELL-O starts out as a liquid thn sets to a gel.wht would u expect to happen to the speed of sound in this material as the JELL-O sets?does it increase decrease or remain the same?

Some animal rely on an acute sence of hearing for survival and the visiable part of the ear on such animal is often relatvly to large.explain how this anatomical feature helps to increase the sensitivity of the animal’s hearing for low intensity sound.

Whn car is rest its horn emitsa frequency of 600 Hz.a person standing on the mddle of the street hears the horn with a frequency of 580 hz. Should the person jump out the wave?

2007-02-04 02:48:17 · 4 answers · asked by Kshitil 1

2007-02-04 02:42:49 · 5 answers · asked by n 1

2007-02-04 02:40:07 · 3 answers · asked by Anonymous

2007-02-04 02:38:54 · 11 answers · asked by Anonymous

2007-02-04 02:29:22 · 10 answers · asked by Anonymous

I ve heard of this Bose Einstein Condensater. Not sure what it does, can some plz explain?

Also i ve heard that it can freeze light to a stand still ! is this really possible..... how will the nature of photons change if so??

2007-02-04 02:12:07 · 2 answers · asked by sh 1

Is it possible for the velocity to remain while the speed varies?

-and-

Is it also possible for the velocity to change while the speed remain as constant?

I need examples for m two questions...

... I know these might been so tough... but please help me find the answers...

Thanks!... To the one who will be a great help to me for this one, "I owe my homework to you"

2007-02-04 01:55:39 · 9 answers · asked by Anonymous

How can I calculate the amount of input force I would need with each turn of the handle and the total amount of force to raise the books with the distance of 20 cm.
the handle has a circumference of 150 cm., the pitch is 2 cm. and the books weigh 10 kg.
would it be F=2pir or W*P/2pir
If i used a pulley system using the same books which one of these machines will have greatest mechanical advantage.

2007-02-04 01:43:41 · 3 answers · asked by ghettoco 1

Consider an individual who can exert a maximum force F=65 lb to the test strap shown in the figure. If the test strap is located a distance s=11 in from the elbow and the biceps muscle attaches a distance of a=2 in from the elbow, what is the magnitude of the force Fb (in lb) exerted by the bicep?

2007-02-04 01:23:01 · 1 answers · asked by Anonymous

can anyone tell me what course should i pursue in order to get into research field .I m doing engineering in electronics and telecommunication

2007-02-04 01:19:14 · 5 answers · asked by Manisha B 1

frm prasad

2007-02-04 01:06:27 · 3 answers · asked by bhanu p 1

It would be better if the answer reffered to pressure, force and area

2007-02-04 00:48:15 · 25 answers · asked by Mj 1

2007-02-04 00:42:56 · 3 answers · asked by teacher's pet 2

2007-02-03 23:58:42 · 5 answers · asked by swaminathan.c i 1

from which of the foillowing two will you get the higher electric shock...

60 hz or 20 khz

2007-02-03 23:53:34 · 9 answers · asked by nasserc267 1

2007-02-03 23:32:31 · 6 answers · asked by Anonymous

2007-02-03 22:15:58 · 10 answers · asked by kimaiü 1

for my physics coursework, i had to build a simple sensor for measuring the voltage of a light dependent resistor (LDR) that was kept underneath a beaker full of water and a light source over the beaker of water. obviously, the light from the lamp passed through the water in the beaker, to the LDR, and according the voltmeter measured a certain voltage across the LDR.
to measure concentration, i had to add small amounts of about 0.01 grams of Copper sulphate salt each time. the solution turned pale blue to brilliant aqua blue and the light passing through the beaker of coloured solution to the LDR would vary, thereby making the voltage of the LDR vary.
now i have to draw a calibration curve of voltage (on the y axis) and concetration (on the x axis) and measure the sensitivty of my sensor.
my question is (if ur not tired reading all this!) is how would you put my sensor in context? how could it be used or developed? are concentratin sensors that use LDRs used in batteries?

2007-02-03 21:32:17 · 1 answers · asked by amandac 3

2007-02-03 21:22:04 · 3 answers · asked by king of kings 2

projects over each point onto the x-axis and then rotates points clockwise through 30 degrees

2007-02-03 21:10:50 · 1 answers · asked by Anonymous

1. the speed of the waves ?

2. the wavelenght of the waves ?

3. the frequency of the waves ?

2007-02-03 21:03:16 · 4 answers · asked by Anonymous