Physics - March 2007

2007-03-22 16:50:46 · 9 answers · asked by Anonymous

Please Help This question is due tomorrow thanks in advance

2007-03-22 16:44:23 · 2 answers · asked by josh h 3

travel so that the angle the string makes with the horizontal is 30 degree?

2007-03-22 16:30:24 · 3 answers · asked by Varun S 1

Can Liquid Water and Steam both exist at 100 Degrees Celcius?

2007-03-22 16:23:18 · 4 answers · asked by jwli920 2

Or tell me if you are worried about the theology of the plite...

2007-03-22 15:36:40 · 9 answers · asked by kailwolf 1

If you have a repelling force in which the strength varies with the inverse square of the distance (i.e. Columb's Law for like charges), imagine having one object fixed. Then, if you have the other start some distance away from this fixed object, obviously the strength of the force diminishes as this object gets further and further away. Say you let the forces act until they get d (distance) away from each other. Is there a way to calculate the speed of the non-fixed object as we let d go to infinity?

Here is the exact wording of a problem I got:
An electron starts from rest 72.5 cm from a fixed point charge with Q=-0.125 microC (1 microC = 1 x 10^-6 C). How fast will the electron be moving when it is very far away?

The constants used are the charge on an electron is 1.60 x 10^-19 C, and its mass is 9.11 x 10^-31 kg.

Thanks in advance!

2007-03-22 15:31:23 · 2 answers · asked by Texas Cowgirl 3

A positron undergoes a displacement (delta) r = 8.0i - 2.0j + 6.0k, ending with the position vector r = 9.0j - 2.0k, in meters. What was the positron's former position vector?

2007-03-22 15:30:25 · 1 answers · asked by Anonymous

2007-03-22 15:29:18 · 6 answers · asked by delaxo34 1

the street lights always go off when my mom drives past them

2007-03-22 15:22:57 · 4 answers · asked by awester13@sbcglobal.net 1

I'm in a pre-physics class and We have been building roller coasters out of popsicle sticks (craft sticks) that has a marble as the coaster cart. But now we have to do a bunch of questions like the actual speed, speed without friction, but now this question that says "What is the Force of Friction on the Marble?" This question is hard and i have been trying to find how to get the force of fiction on the marble for about one week and i need some help!

2007-03-22 15:21:48 · 1 answers · asked by cesar t 1

so i understand that the reason why e's and p's don't stick together in atoms w/ more than 1 electron is b/c that other e would have a repelling force on the other e, so that counters the attraction btwn e and p, but when you've only got 1 e (in H atom), why doesn't it just stick to p since only that attraction is present? why does the lone e still orbit about the neutron?

2007-03-22 15:16:01 · 3 answers · asked by 1A2B3C 2

2007-03-22 15:13:17 · 13 answers · asked by Anonymous

Tell me what type of energy conversion is taking place and explain why.

2007-03-22 15:08:37 · 5 answers · asked by richgarwong 1

2007-03-22 15:02:57 · 5 answers · asked by shay52 b 1

It is because of some energy thing or what

2007-03-22 14:52:52 · 7 answers · asked by dance_queen345 2

A worker exerts a force of 119N on a lever to raise a block. The efficiency of the lever is 91.6%. If the lever is moved .770m, the block rises to a height of .180m. What is the mass of the block?

2007-03-22 14:49:12 · 1 answers · asked by Adam P 1

If the car wheels are replaced from a diameter of 15in to 17in, and the car actually drives 100,000mi, what does the odometer read in meters?

2007-03-22 14:37:29 · 3 answers · asked by fathotra 1

A person uses a pulley system to raise a 23.1kgblock to a height of 18m.if a force of 124N is exerted on the rope is pulled 34.2 m. find the efficiency of the system

2007-03-22 14:18:55 · 1 answers · asked by Adam P 1

Light of wavelength 542 nm in air enters a fishbowl filled with water, then exits through the crown-glass wall of the container. The refraction index for water is 1.333 and for crown-glass 1.52. Answer in units of nm.

2007-03-22 14:12:13 · 3 answers · asked by Anonymous

an electric motor uses 670 kJ of electrical energy to generate 596 kJ of mechanical kinetic energy. What is the efficiency of the motor?

2007-03-22 13:54:36 · 1 answers · asked by richey 1

2007-03-22 13:49:36 · 2 answers · asked by brookieg8 2

i dont know what end to look at when doing the # # x 10^# thing in my physics honors class

2007-03-22 13:44:24 · 2 answers · asked by mark c 1

2007-03-22 13:42:49 · 3 answers · asked by Anonymous

2007-03-22 13:28:45 · 2 answers · asked by iSmile 2

brain
teaser

2007-03-22 13:24:59 · 2 answers · asked by Anonymous

I placed the north (geographical north) pole of a magnet towards the side of a fish tank (which needs cleaning) & left it there for approx 12hrs (over night). White stuff (minerals? mold?) appeared on the inside of tank covering where the magnet was (a small circle shape). I then did the same thing but with the opposite pole facing the tank and the next day the white stuff had disappeared again. Is this proof the poles of a magnet can have a different effect?

2007-03-22 13:23:31 · 1 answers · asked by Joe 2

The modulator is at a set frequency, what crystals would be best for it's use? Any dimensions of the crystal would be great!

2007-03-22 13:21:29 · 2 answers · asked by Anonymous

An unbalanced force of 12N is required to slide a 12.6kg at rest. How much work is done during the first 3 seconds? I you could explain how to do this, it would make me very happy...thanks

2007-03-22 13:14:58 · 2 answers · asked by Advicegiver 2

The magnitude of the velocity with which the rock hits the ground below is

2007-03-22 13:03:38 · 1 answers · asked by l_walker2005 1

A capacitor with initial charge q is discharged through a resistor. What multiple of the time constant gives the time the capacitor takes to lose (a) the first one-third of its charge (b) two-thirds of its charge?

2007-03-22 13:03:28 · 1 answers · asked by Make a wish 1