Physics - January 2007

Looking for something simple, this is a first year physics class for me.

2007-01-29 04:17:15 · 3 answers · asked by wencar29 1

sound waves

2007-01-29 04:11:39 · 5 answers · asked by bjb 1

2007-01-29 04:06:15 · 8 answers · asked by Anonymous

recently we've been doing physics coursework at school. we had to make sensors using fixed resistors as part of a potential divider circuit. since we had to choose a resistor of a specific value on our own, some kid didn't choose the right one and soon after he turned his power pack on at 6 Volts and connected it to his rotary potentiometer, smoke started coming out of the fixed resistor and it stank really badly.
my question is, what makes a fixed resistor burn like that? was it because he chose a very small resistance or a large resistance? was it because of excess electric charge in the circuit or excess electric current? what makes a component in an electric circuit burn like that? could i have some kind of scientific explanation pls? i need it for my coursework.

2007-01-29 04:04:45 · 6 answers · asked by amandac 3

also tell me how they affect the body

2007-01-29 03:59:07 · 3 answers · asked by gaugemusick 1

can you help me to prepare some innovative work regarding the subject physics or chemistry?

2007-01-29 03:49:26 · 5 answers · asked by Anonymous

I've got a science fair and i'm doing the egg drop. I don't need acceleration, velocity, or gravity. (i've also got newton's 3 laws of motion). i just need some info!!!!!!!! Thanks SO much!!!

2007-01-29 03:31:24 · 1 answers · asked by ♥Ѧƨԋʅɛץ ïи ωѳиԃԑᴙʅαиԃ♥ 3

On the origin of the Universe, Designer Tarcísio Brito says: Great Atom of name Universe, finite in its dimension and the infinite in its time (it answers in contrast for everything of the nothing).

2007-01-29 03:02:35 · 2 answers · asked by britotarcisio 6

2007-01-29 02:59:04 · 2 answers · asked by PCMCPPE 1

So that, the Universe keeps the balance of its existence, was necessary to interact a source of nêutrons, it enters two power plants you oppose. Example: The Sun answers as the nucleus (positive energies, concentrated - “heat”). The set of all the stars amongst the interstellar System, answers for the peripheral part (negative energies, distributed - “Cold”). The Land in turn answers through its orbit “center of the balanced energies” (nêutrons - heat and cold) answering for this conscience of the life of the species beyond receiving and liberating energies finitely to feed the Sun and the Interstellar System.

2007-01-29 02:47:35 · 1 answers · asked by britotarcisio 6

What causes people to see above the water level inside a submarine? Is it scattered light, bent light or both?

2007-01-29 02:45:15 · 3 answers · asked by bjb 1

i always get static in everything i touch. i even get static if i touch someone. i can't even hold, kiss or go nearby anyone because there's always a spark. i can't touch switches coz i get ground. i tried wearing a rubber wrist band, no use. wore a rubber glove, not working. i can't go anywhere and i carry this fear that if i get close someone, i just get static. i'm so irritated. what should i do?

2007-01-29 02:38:45 · 11 answers · asked by question marc??? 1

2007-01-29 02:22:46 · 9 answers · asked by varun 1

2007-01-29 02:22:22 · 2 answers · asked by kl 1

In hitting a stationary hockey puck having a mass of 179g a hockey player gives the puck an impulse of 5.4 N-s.

2007-01-29 02:13:09 · 2 answers · asked by Erica 1

How much power is developed by an electric motor that moves a 500N load a distance of 20m in 10s?

2007-01-29 02:10:56 · 1 answers · asked by Jillian O 1

A long thin rod lies along the x-axis from the origin to x=L, with L= 0.710 m. The mass per unit length, l (in kg/m) varies according to the equation l = l0 (1+1.110x3). The value of l0 is 0.300 kg/m and x is in meters.
Calculate the total mass of the rod.
Calculate the x-coordinate of the center of mass of the rod.
Calculate the moment of inertia of the rod with respect to the y-axis.

2007-01-29 02:07:20 · 1 answers · asked by Anonymous

A pebble rolls off the roof of the school and falls vertically. Just before it reaches the ground, the pebble's speed is 17 m/s. Neglect air resistance and determine the height of the school.

2007-01-29 02:05:44 · 4 answers · asked by Jillian O 1

How long does it take a plane, traveling at a constant speed of 110m/s, to fly once around a circle whose radius is 2850m.

2007-01-29 01:58:43 · 3 answers · asked by katmariea 1

Is there a formula to do this based on an objects mass or density?

2007-01-29 01:54:21 · 7 answers · asked by Anonymous

I need to make a vacuum for science class. How would I make one?

2007-01-29 01:41:33 · 4 answers · asked by Anonymous

its for a schools thing. so... i need correct info.

2007-01-29 01:40:26 · 3 answers · asked by Anonymous

2007-01-29 01:38:34 · 2 answers · asked by Sir D 1

Using lab equipment, namely a spring, a mass, timers etc
How?
This should be at AS level, I just need an experiment!
Thanks xxxXxxx

2007-01-29 01:36:40 · 4 answers · asked by Anonymous

2007-01-29 01:15:19 · 3 answers · asked by jana l 1

2007-01-29 01:10:54 · 1 answers · asked by Anonymous

If you have a block of mass 100kg, initially at rest and drop it 10m and it impacts the ground and does not bounce it just lands flat. What are the forces it imparts on the ground and what are the forces the ground imparts on it.

I have tried simply v=(gt)^.5 and d=.5 gt^2 and solved for the finial velocity and time and calculated acceleration = change in v/ change in t, which I get the force of gravity F=ma then W=mg and the total F= ma-mg which turns out to be zero. What am I doing wrong?

2007-01-29 01:03:36 · 6 answers · asked by marry a 1

2007-01-29 01:03:11 · 2 answers · asked by neza 1

what are the physical phenomena that can influence the frequency of a photon, so as to modulate it

2007-01-29 00:55:01 · 3 answers · asked by Anonymous

2007-01-29 00:45:27 · 15 answers · asked by anuj 1