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Physics - November 2006

[Selected]: All categories Science & Mathematics Physics

2006-11-17 06:42:42 · 2 answers · asked by BOO! 2

2006-11-17 06:32:56 · 5 answers · asked by tezcan 1

I just got a battery operated detector and want to be sure I place at the right height to be most effective, since CO kills people.

2006-11-17 06:18:27 · 11 answers · asked by Everyman 3

A person has a mass of 80 kg. They go for a run with a constant speed of 3.5 m/s. When running against a resistive wind force they have to generate 50 W more power than running with the same wind force. How strong is the force due to the wind?

2006-11-17 06:12:17 · 2 answers · asked by flori 4

Calculate the radius of the orbit of Mars as it circles the sun in units of m.

Given for purposes of this problem: Mars (mass of 2 x 10^30 kg) requires 2.46 years to orbit the sun, which has a an almost circular trajectory.

The gravitational constant is 6.672 x 10^-11 N m^2/kg^2.

2006-11-17 06:01:57 · 2 answers · asked by Dee 4

You and a friend are sitting in the bleachers of a major league baseball park, 140 m from home plate on a day when the temperature is 20°C. Your friend is listening to the radio commentary with headphones while watching. The broadcast network has a microphone located 17 m from home plate to pick up the sound as the bat hits the ball. This sound is transferred as an EM wave a distance of 66,000 km by satellite from the ball park to the radio.

What is the shortest time interval between the bat hitting the ball and one of you hearing the sound?

How much later does the other person hear the sound?

2006-11-17 05:30:33 · 3 answers · asked by p_rob22 1

2006-11-17 05:07:37 · 12 answers · asked by Anonymous

slow down or stop by making a sudden turn of your body? Like 360 degree spin? The reason I ask is because I dreamt that I couldn't stop running down a street/hill because I was going so fast that I was afraid of getting hurt, so I decided to spin my body and fall to the ground, and that's when I stopped.

2006-11-17 04:56:03 · 7 answers · asked by Anonymous

My beliefs are pretty much a mix of methodism/deism/quantum physics, and i believe that your perception of the world, its gods, and your ideas about the afterlife and the state of the universe will determine what you percieve as your afterlife. In quantum physics, time does not exist. Also, in order to exist, something must be observed. As time does not exist, and the perception of time is simply our minds viewing the different probabilities the world may exist in. Therefore, all people are both alive and dead. In order to observe ourselves and observe others, we must exist. As something cannot both exist and not exist, only change form or be transfered between dimensions, the sentience that inhabits our bodies must persist after death for us to observe our lives, as both life and death occur simultaniously according to this worldview.

Therefore, there must be something beyond death.

Your thoughts?

2006-11-17 04:37:57 · 9 answers · asked by fishthevile 1

Considering the complexity of physics seen on the test on the following web page:

http://haddadusa.com/Jokes/General/Misc_Pictures/Physics_Test.jpg

Why do we need physics?

2006-11-17 04:29:11 · 2 answers · asked by TPCAN 3

Explain in as much detail as possible how the audio sound from the station is transported across the country and played on radios.

2006-11-17 03:59:31 · 8 answers · asked by mr yass 2

What would be the bit rate(bps=bits per sec) for 44.1kHz sampling and 8bits precision?
A. 352.8 bps
B. 40,000 bytes/s
C. 352.8kbps
D. 40 bytes/s
E. 82 kbyts/s

i got 44,100 samples/second * 8 bits/sample * 2 channels= 705,600 bits/second

=88,000 bytes/second

what did i do wrong?

2006-11-17 03:56:08 · 1 answers · asked by Diggler AKA The Cab Driver 1

2 similar but unrelated problems:

1) If Saturn has a mass 95.2 times that of Earth, and a radius 9.47 times that of Earth, what is the escape speed for objects on the surface of Saturn (in km/s)?

2) What is the escape speed for a rocket leaving the moon if the acceleration of gravity on the moon is 0.166 times that on earth and the moon's radius is 0.273 RE (in km/s)?

2006-11-17 03:53:05 · 2 answers · asked by Dee 4

What was around the singularity concurrent to it being a singularity and did that singularity emit or did it suck. And, can such a singularity exist in our current universe waiting to bang

2006-11-17 03:43:30 · 6 answers · asked by breastfed43 3

The period of the earth around the sun is 1 year, and it is at a distance of 150 million kilometers from the sun. An asteroid in a circular orbit around the sun is at a distance of 632 million kilometers from the sun.

Already determined that the period, Ta, of the asteroid orbit in years is (632/150)^(1.5) * 1 year.

NEED TO DETERMINE the orbital velocity of the asteroid in m/s assuming 365 days in one year.

2006-11-17 03:35:00 · 2 answers · asked by Dee 4

Is the concept of acceleration fictitious? when some one experience a free fall isnt he accelerating?

2006-11-17 03:19:07 · 1 answers · asked by goring 6

Isnt dark matter the only substance that would be considered massless?

2006-11-17 03:11:23 · 2 answers · asked by goring 6

and the train is heading towards the person and the train hits the person and keeps going, does the train stop?
Confused??? So are we. my work mate says it has been scientifically proven that the train has to have stopped!, but we don't understand his explanation - can anybody please help before the rest of the office goes mad!!!

2006-11-17 03:03:11 · 21 answers · asked by geegee 4

Arent all masses at rest ,that is at zero velocity ,all have zero momentum?So light wouldnot be an exception?

2006-11-17 02:49:54 · 8 answers · asked by goring 6

What happens when something is moving is there a force?
Are forces in continual motion ,does a force increase with velocity?

2006-11-17 02:33:47 · 4 answers · asked by goring 6

I've just been exposed to this idea(ideas really) and they seem to make a heck of a lot of sense as far as nature of reality, but I'd like to ask people who are more in the know about science than I would, what is your take on Quantum Physics and how it relates to the nature of reality(and to answer a potential question, it was watching the movie "What the Bleep do we know" that got me thinking about this subject.

2006-11-17 02:31:58 · 4 answers · asked by Tinalera 2

What happens when something is moving is there a force?
Are forces in continual motion ,does a force increase with velocity?

2006-11-17 02:30:01 · 1 answers · asked by goring 6

A cord of length 1.5 m is fixed at both ends. Its mass per unit length is 1.2 g/m and the tension is 12 N.

What is the frequency of the fundamental oscillation?

2006-11-17 02:19:30 · 2 answers · asked by David S 2

2006-11-17 01:52:49 · 6 answers · asked by rouf_assiya 1

My limited understanding is that Centrafugal force is the name for the commonly felt effect of Centrapetal force, that it is a common misconception and that Centrapetal Force is actually at work trying to pull you to the centre and not spin you outwards (the affect that people call centrafugal force)

2006-11-17 01:21:22 · 16 answers · asked by litulbear 2

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