Physics - February 2007

I'm trying to understand relativity. I'll buy the slower clock bit, but I still wonder if that directly corresponds to aging...

2007-02-11 04:16:55 · 4 answers · asked by BigKnuckle 1

HELP ME PLEEZ

2007-02-11 04:16:49 · 2 answers · asked by Anonymous

I know it's because of the Bernoulli effect, but what is a simpler way of explaining or demonstrating this?

2007-02-11 04:15:45 · 5 answers · asked by sabrieyl 1

I often ask on here, when did time begin, I know that no-living thing can answer this question. People tend to say that it has no beginning, and I question them "how could something with no beginning exsist?"
People come up with the conclusion statement that human minds can't grasp the concept of there not being a beginning...
But although our puny human minds can't grasp it, mathematically and theoretically, it's impossible for something to have NO origin.
People say that the big bang created time, that's impossible. What was before the big bang?

When I think deeply about this life.. and the general beginning of time, like I mean trillions and trillions and trillions.. ect of years ago BEFORE the big bang, it leaves me awestruck and sometimes I come up with the conclusion that life is nothing but a mere illusion, that only I AM experiencing, it's mind boggling and quite scary to think about

Your thoughts?

2007-02-11 04:12:10 · 6 answers · asked by Anonymous

I need this before monday, pleeez help!

2007-02-11 03:56:16 · 16 answers · asked by Anonymous

Question: the solar wind is a thin, hot gas given off by the sun. charged particles in this gas enter the magnetic field of the earth and can experience a magnetic force. suppose a charged particle traveling with a speed of 9.0e6 m/s encounters the earth's magnitude of 1.2e-7 T. assuming that the particle's velocity is perpendicular to the magnetic field at an altitude where the magnitude of 1.2e-7 T. assuming that the particle's velocity is perpendicular to magnetic field find the radius of...Find (a) an electron and (b) a proton

My Approach:

(a) electron
r = (9.11e-31)(9.0e6)/ (1.6e-19)(1.2e-7) = 427 m

(b) proton
r = (1.67e-27)(9.0e6)/ (1.6e-19)(1.2e-7) = 7.83e5 m

Book Answer: I don't have the answer to (a); however, for part (b) it is supposed to be 7.83e8 m. it's the reason why im posthing this question! appreciate the help

2007-02-11 03:45:40 · 2 answers · asked by Jimmy 3

2007-02-11 03:37:18 · 4 answers · asked by Andrew 2

What is the differece between "inertial mass" as in F=ma, and "gravitational mass" as in F=mg?

Also does it matter if we designate diatance as "x" or "d"?

2007-02-11 03:21:24 · 8 answers · asked by angelgirl 2

for an application where a small amount of warmth is needed, and electrical or other power sources are unavailable... could simple flexing / working of the material generate a small amount of heat, without destroying the material over time.

2007-02-11 03:11:02 · 1 answers · asked by David H 1

Do you think Science and Spirituality is contradictory?

According to Indian Culture and spirituality, the whole nature (observing phenomena) is part of the self (observer), and there is no duality between the two (Advaita). Einstein describes that the whole matter is nothing much vibration of energy (e=mc2) - which means everything we see is play and display of the same energy.

Science knows that the base or substratum of matter is energy. Vendanta goes further - it explains the whole matter as vibration in the level of energy , and continues further, to explain that the substratum or base of whole energy is conciousness. This can be compared with the observations of String theory and UFT.

See http://amazedsaint-intutions.blogspot.com for my thoughts. Post your observations on this.

2007-02-11 03:07:49 · 7 answers · asked by amazedsaint 2

also what changes does each subatomic particle carry

2007-02-11 02:55:42 · 5 answers · asked by ititit3 2

I haven't learnt calculas yet

2007-02-11 02:55:15 · 2 answers · asked by goldengal 2

A 0.50 kg uniform bar with a length of 1.00 m has a fulcrum placed 40.0 cm from the left end of the bar. Also located from the left end of the bar are a 1.0 kg mass (m1) at 10.0 cm and a 2.0 kg mass (m2) at the 90.0 cm mark. Mass m2 also posses a charge (q2) of 4C. A charge q3 is placed 20.0 cm below the beam and holds the bar in rotational equilibrium parallel to the ground. Ignoring the polarization effects of the charges on the bar, what is the charge of q3?

I got that Fg=FE so I solved for q1: 8.7*(10^-5)C

But I'm stuck now..please help

2007-02-11 02:46:11 · 1 answers · asked by Anonymous

Have you ever imagine that all our knowledge is missing something to give an integral answer for the meaning questions.

2007-02-11 02:42:52 · 2 answers · asked by Jesús V 3

1. Which one of the following frequencies of a wave in the air can be heard as an audible sound by the human ear?
A. 0.10 Hz
B. 10 Hz
C. 1,000 Hz
D. 100,000 Hz
2. If two waves with equal amplitudes and wavelengths travel through a medium in such a way that a particular particle of the medium is at the crest of one wave and at the trough of the other wave at the same time, what will happen to that particle?
A. The particle will vibrate with double amplitude due to resonance
B. The particle will remain stationary due to interference
C. The particle will move halfway to the crest due to reinforcement
D. The particle will cause beats as a result of the wave combination

2007-02-11 02:33:37 · 3 answers · asked by tami c 1

this is a question of topic surface tension....prefferably give an ans related to that.
but plz give another method, if u know......
thanks a lot for ur help......i will chose the most convincing answer as the best one......

2007-02-11 02:28:30 · 2 answers · asked by practico 1

What is the acceleration of a 40-kg block of cement when pulled sidways with a net force of 200N?
Can anyone show me how to figure this out?

2007-02-11 02:10:58 · 6 answers · asked by angelgirl 2

2007-02-11 02:07:35 · 1 answers · asked by sneha 1

Gravel is dropped into a conveyor belt @ 0.4 kg/s. Find the extra force required to keep the belt moving at a speed of 4 m/s.

My doubt is, since the gravel is being dropped vertically, it should have no affect on the horizontal motion of the belt, as vertical & horizontal components of any vector quantity do not affect each other. So, please explain the answer & rectify me if I'm wrong.

2007-02-11 02:06:12 · 2 answers · asked by Kristada 2

2007-02-11 01:47:42 · 9 answers · asked by Sid 2

I'm using a piezoelectric igniter (brand name, Lightnin' Bug, sold for acetylene torches) which I bought specifically so I wouldn't have to keep matches around the kitchen. I've tried it on my stove, it won't work, on a butane lighter, on a paper towl soaked with ether. Nothing lights! I'm astonished.

Is the ignition energy for acetylene THAT MUCH lower than that of producer gas, that these sparks won't light anything else...? I know that the spark TEMPERATURE should be high enough, and I had read of a piezo device being used to ignite wood alcohol, that's why I figured it would have to work. 10 points to the one who can clear up this mystery for me.

(In the meantime, please don't be worried, on my behalf. I've gone back to using matches for the time being, there are no kids or pets in the house and I'm not leaving flammables around. I'm in no danger of fire or explosion.)

2007-02-11 01:36:38 · 7 answers · asked by cdf-rom 7

Ofcourse, there is always the race to the nearest washroom midway through the day: Paul and Robbie decide to have a race. The sign indicates the washrooms are 200 m away. if Paul runs 3.0 m/s and Robbie at 3.5 m/s, How much time does the winner wait for the other person at the washroom?

2007-02-11 01:34:26 · 6 answers · asked by avant1991 3

2007-02-11 01:08:07 · 3 answers · asked by Anonymous

In what time after starting will the skier acquire a speed of 24m/s? Assume that the acceleration is constant and the path is straight?

2007-02-11 00:39:09 · 6 answers · asked by stephy 1

what please while you're at it, I encourage you to use another couple sentences distinguishing special and general relativity

2007-02-10 23:40:26 · 8 answers · asked by JizZ E. Jizzy 2

Imagine a plane is sitting on a massive conveyor belt, as wide and as long as a runway.

The conveyor belt is designed to exactly match the speed of the wheels, moving in the opposite direction.

Can the plane take off?

2007-02-10 22:44:22 · 11 answers · asked by NebRon 2

Hello guys, sorry that im rushing u guys answer my question and im just wondering that what is the relationship between the gravity, length of pendulum and the period ? im doing an experiment called acceleration due to gravity and we have to calculate the time of ten swings and try more than once... pls help pls help thanks thanksssss

2007-02-10 22:34:27 · 1 answers · asked by physicer p 1

2007-02-10 21:12:31 · 14 answers · asked by saipriya 1

i would like to find the equation that explains flight by itself.

i remember it included 'Rho' and velocity in it.

thanks, :)

2007-02-10 21:07:11 · 2 answers · asked by Jonny 1

I'll admit im a Start Trek- the Next generation fan. The Holodecks amaze me- do you think it is within the relm of possibility that 3d interactve holograms could one day be created? It would certianly revolutionize the porn industry! But seriously, what would it take to convert a hologram into a solid, tangible object? Is it theoretically possible?

2007-02-10 20:38:50 · 3 answers · asked by OctopusGuy 1