Physics - March 2007

2007-03-24 01:29:03 · 11 answers · asked by Marcus Ariel 2

2007-03-24 01:02:42 · 5 answers · asked by COOL BUDDY 2

is it true that it take more energy to vaporize 1 kg of water saturated liquid at 100°C than it would at 120°C?

2007-03-24 00:37:22 · 2 answers · asked by Anonymous

2007-03-24 00:26:52 · 4 answers · asked by Invictus 1

http://www.deena-92.piczo.com
Scroll all the way down to the page and hit on physics these are the questions! PLEASE HELP, i need to revise these questions for an upcoming test

2007-03-24 00:06:02 · 3 answers · asked by Jaimee Ariane 3

2007-03-24 00:00:33 · 1 answers · asked by jerry s 1

2007-03-23 23:41:09 · 1 answers · asked by Anonymous

2007-03-23 22:53:14 · 2 answers · asked by potzkie 1

We all know that in the outer space, sound vibrations cannot be transmitted because there is absence of air (unlike on Earth, we can communicate with each other because sound vibrations pass through air). Then, how a satellite communicates with Earth? and how astronauts communicate with N.A.S.A and whith each other ?!
scientific answer plz

2007-03-23 22:13:25 · 4 answers · asked by The Reaper 1

do any one know any free desktop wallpaper downloads

2007-03-23 21:46:22 · 4 answers · asked by Anonymous

do the clocks go forward today before we go to bed

2007-03-23 21:40:36 · 10 answers · asked by Anonymous

Consider a walled mounted power transistor that dissipates 0.18W of power in an environment at 35 degree Celsius. The transistor is 0.45cm long and has a diameter 0.4cm. The emissivity of the outer surface of the transistor is 0.1, and the average temperature of the surrounding is 25 degree Celsius. Disregarding any heat transfer from the base surface, determine the surface temperature of the transistor. Use air properties at 100 degree Celsius.

2007-03-23 21:27:35 · 1 answers · asked by simk0003 2

when a p type and n type material is come to contact a pn junction diode is formed.While drawing the energy level diagram p type part is higher than n type.
________
\
p \_________
________
\ n
\_________
why? and what is the significance of fermi level here?

2007-03-23 21:24:32 · 3 answers · asked by Bipin mzr 1

Two vehicles A and B are traveling west and south, respectively, toward the same intersection where they collide and lock together. Before the collision A (total weight 1170 N) is moving with a speed of 50 m/s and B (total weight 2710 N ) has a speed of 41 m/s.

What is the direction of motion of the interlocked vehicles immediately after the collision?

2007-03-23 20:52:04 · 5 answers · asked by Geoff M 1

A bungee jumper (m = 80.00 kg) tied to a 36.00 m cord, leaps off a 66.00 m tall bridge. She falls to 5.00 m above the water before the bungee cord pulls her back up. What size impulse is exerted on the bungee jumper while the cord stretches?

2007-03-23 20:49:50 · 2 answers · asked by Geoff M 1

Based on current.

2007-03-23 20:32:09 · 4 answers · asked by Anurupa 1

2007-03-23 20:26:50 · 1 answers · asked by Anurupa 1

2007-03-23 20:26:48 · 6 answers · asked by Anonymous

A uniform plank of length 5.8 m and weight 234 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support. To what distance x can a person who weighs 453 N walk on the overhanging part of the plank before it just begins to tip?

2007-03-23 20:10:23 · 1 answers · asked by vntraderus88 1

If so, what do you think of it?? Especially looking for answers from Christians. Here's the website if you don't know what I'm talking about. She bases her work on the Bible and Jesus Christ, and incorporates Quantum physics.

www.ramtha.com

2007-03-23 19:57:30 · 2 answers · asked by Bella_Donna 2

Considering that the following reaction occurs at room temp and pressure:

2Cl (g) ------> Cl2 (g) Delta H= -243.4kJ

Would 2Cl (g) or Cl2 (g) have a higher enthalpy? Please explain.

2007-03-23 19:51:47 · 1 answers · asked by The monkey did it! 1

Okay. This question pretains to temperature of atoms and subatomic particles.

As I understand it, thermal energy comes from the random motion of atoms in an object. I'm perfectly willing to accept this. However, what if we have a single atom?

Furthermore, I saw a title for a paper at www.arXiv.org that had "the Electron Temperature Gradient of the Milky Way" in it. That got me wondering, can subatomic particles, such as electrons, have temperatures? If so how? If not, why?

2007-03-23 19:16:00 · 2 answers · asked by Anonymous

2007-03-23 19:10:40 · 1 answers · asked by prs1145 1

2007-03-23 19:03:12 · 7 answers · asked by Anonymous

2007-03-23 18:53:02 · 3 answers · asked by charisse 1

i am looking for PSI

2007-03-23 18:52:04 · 8 answers · asked by tgs721 1

Why do electrons keep moving around the nucleus and not away from the atom

2007-03-23 18:03:05 · 6 answers · asked by James D 1

Why are protons and neutrons also known as nucleons?

2007-03-23 17:40:58 · 5 answers · asked by Thejames A 1

2007-03-23 17:23:58 · 19 answers · asked by arista j 1

2007-03-23 16:35:58 · 6 answers · asked by Lizzie 5