Physics - January 2007

in an auditorium, a man sitting in a particular seat can hear the speaker clearly while a person sitting two seats behind him can hardly hear the speaker. explain.

2007-01-28 14:26:00 · 2 answers · asked by curious kitty 1

2007-01-28 14:23:12 · 2 answers · asked by Mark Daryl R 2

Question: A positive charge +q1 is located to the left of a negative charge -q2. On a line passing through the two charges, there are two places where the total potential is zero. The first place is between the charges and is 4.00 cm to the left of the negative charge. The second place is 7.00 cm to the right of the negative charge. (a) What is the distance between the charges? (b) Find q1/q2, the ratio of the magnitudes of the charges.

My Thoughts:
Ok...This might be one of the most confusing questions I've ever encountered in Physics! I drew a diagram, but i had no clue what i was doing. I know the equation V = Kq/r is supposed to be used, but i don't know what to substitute in the problem!!! please show me how you do this problem. appreciate all the help i can get!

Book Answer: I only have part b, which is 3.67

(Note: I will award a best answer - i promise)

2007-01-28 14:07:21 · 1 answers · asked by Anonymous

what is the difference between light and laser?

2007-01-28 13:53:39 · 5 answers · asked by Amy 2

The three-toed sloth is the slowest moving land mammal. On the ground, the sloth moves at an average speed of 0.048 m/s, considerably slower than the giant tortoise, which walks at 0.083 m/s. After 12 minutes of walking, how much further would the tortoise have gone relative to the sloth?

2007-01-28 13:36:04 · 2 answers · asked by mariah3785 1

v= v0 + gt

2007-01-28 13:32:59 · 1 answers · asked by Anonymous

produced from moving water.Usally the water is stored behind a dam on a river.As the water passess throuth a turbine, it spins the blades of the turbine.The rotating motion turns on a generator which produces electicity.

2007-01-28 12:56:30 · 4 answers · asked by bratz g 1

From what I understand, the energy of xrays increase at a certain value specific to the anode material. I can not find any information on characteristic peak, all my searches lead me to kilovolt peak.

2007-01-28 12:51:11 · 1 answers · asked by natasha a 1

when the brakes lock? (This question is typical on some driver's license exams.)

2007-01-28 12:27:34 · 6 answers · asked by Drew 2

If you have a ball of clay, and mold it into a bunch of shapes, does the volume change? i know the density and the mass do, im not so sure about the volume

2007-01-28 12:27:02 · 3 answers · asked by ? 2

2007-01-28 12:21:07 · 5 answers · asked by Anonymous

A helicopter is ascending vertically with a speed of 1.00 m/s. At a height of 70 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? [Hint: The package's initial speed equals the helicopter's.]
s

2007-01-28 12:16:01 · 2 answers · asked by nafiseh g 1

2007-01-28 12:11:05 · 4 answers · asked by seeker 1

Can quantum laws be used to explain gravitation?

2007-01-28 11:50:26 · 7 answers · asked by yan 2

I am trying to do a science project on hydrogen, but i want to know a good way to produce it effeciently, like making electrolysis more effecient or something like that.

If not this, do you have any other, unique ideas on a science fair project?

Thank you.

2007-01-28 11:49:17 · 2 answers · asked by Anonymous

2007-01-28 11:28:02 · 4 answers · asked by Anonymous

I have been wondering if our government is trying to develope energy weapons that do not rely on projectiles such as bullets, bombs, missles etc...And some kind of invisible protective shielding made of energy. Any thoughts on this people?

2007-01-28 11:16:18 · 6 answers · asked by garden witch 2

In the simplest terms you can put it in. All I know is that conservative forces are reversible, but I don't really understand why.

2007-01-28 10:59:29 · 2 answers · asked by Anonymous

If so, what evidence has been obtained with regards to this?

2007-01-28 10:53:51 · 5 answers · asked by Zeek 3

2007-01-28 10:48:49 · 1 answers · asked by david w knows best most times if 1

wat does it cause

2007-01-28 10:39:10 · 5 answers · asked by beagleowner2 3

lightbulb useing water a lightbulb and a battery



PLEASE HELP ME

2007-01-28 10:28:24 · 2 answers · asked by morgan_rules76 1

How do you find Fk? Is this the same way to find Fs in the equation μ=Fs/Fn for static friction?

2007-01-28 10:21:13 · 3 answers · asked by Anonymous

2007-01-28 10:17:01 · 11 answers · asked by Kenny 1

2007-01-28 10:05:48 · 10 answers · asked by Anonymous

A constant net force of 410 N is applied upward to a stone that weighs 32 N. The upward force is applied through a distance of 2.0 m, and the stone is then released. To what height, from the point of release, will the stone rise?

Please help me with this problem.
I'm having understanding how to solve it.
I have no idea what to do.

2007-01-28 09:55:37 · 2 answers · asked by vicky p 1

2007-01-28 09:49:49 · 6 answers · asked by Danny F 2

2007-01-28 09:40:23 · 13 answers · asked by Anonymous

2007-01-28 09:35:25 · 11 answers · asked by randy_rivet 1

Someone told me that if a nuclear bomb went off in the Middle East, the radiation could travel to us (In little ole' Kansas) and kill us, or at least make us very sick. But that doesn't seem right to me. It can't really travel that far, can it? And even if it could, wouldn't it be so dilluted that it wouldn't really do anything?

2007-01-28 09:34:24 · 6 answers · asked by Anonymous