Physics - August 2007

Science report due...need some ideas...THANKS!

2007-08-26 09:56:42 · 4 answers · asked by mary1234 2

I said:
The scale of our understanding will always remain within the limits of our dimensions.
The paradox about "Big" is when it is too big, you can not see it.

Please develop and argument.

2007-08-26 09:39:22 · 10 answers · asked by Anonymous

A woman on a bridge 77.0 m high sees a raft floating at a constant speed on the river below. She drops a stone from rest in an attempt to hit the raft. The stone is released when the raft has 6.50 m more to travel before passing under the bridge. The stone hits the water 3.10 m in front of the raft.

2007-08-26 09:19:45 · 2 answers · asked by slowphysicsstudent 1

I was wondering what is the most accepted theory on what the shape of the WHOLE universe is? I have heard it is a globe shape much like a planet, I have also heard that if you were to look at it from a distance it is like a sheet of paper. And I have even heard that it is ever expanding in 360 degrees. Which is the most accepted?

-Nate-

2007-08-26 09:14:36 · 7 answers · asked by emeraldwarrior420 2

The length of the barrel of a primitive blowgun is 1.1 m. Upon leaving the barrel, a dart has a speed of 19 m/s. Assuming that the dart is uniformly accelerated.

2007-08-26 08:46:41 · 2 answers · asked by Anonymous

What about with constant speed?

Theoretically, and if you were going slow enough, I'm sure you could keep your velocity and speed constant. Or am I missing something fundamental?

2007-08-26 08:37:32 · 12 answers · asked by Diff 1

A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 3.8 m/s. The car is a distance d away. The bear is 25 m behind the tourist and running at 6.0 m/s. The tourist reaches the car safely.

2007-08-26 08:29:39 · 2 answers · asked by Anonymous

An airplane is flying at a speed of 390 mi/h at an altitude of one mile and passes directly over a radar station at time t = 0. Express the distance s between the plane and the radar station as a function of d, the distance the plane has flown, in miles.

2007-08-26 08:08:57 · 2 answers · asked by Anonymous

this is a physical science question

2007-08-26 08:06:13 · 5 answers · asked by franki b 1

You are to drive to an interview in another town, at a distance of 350 km on an expressway. The interview is at 11:15 A.M. You plan to drive at around 100 km/h, so you leave at 8:00 A.M. to allow some extra time. You drive at that speed for the first 100 km, but then construction work forces you to slow to 55 km/h for 40 km. What would be the least speed needed for the rest of the trip to arrive in time for the interview?

(I have two answers to this question but I am not sure which is right, if you do answer please include your method for solving as well)

2007-08-26 07:58:28 · 3 answers · asked by lapyramid 5

A wooden cylinder 30.0cm high floats vertically in a tub of water (density = 1.00g/cm^3). The top of the cylinder is 14.1 cm above the surface of the liquid. What is the density of the wood???

2007-08-26 07:35:10 · 3 answers · asked by Susieq1118 2

who choose that? and why people accept that?

2007-08-26 07:18:51 · 2 answers · asked by Anonymous

I've had this question since I was a kid. Many people including my teachers, have tried explaining it to me, but I just don't seem to get it.
The higher you go, the colder it gets; but we know that cold air is heavier than hot air, so hot air goes up and cold air goes down. So it ideally should get hotter the higher you go (in the atmosphere wherein the sun rays are partially trapped).

2007-08-26 07:12:33 · 7 answers · asked by MZ 2

2007-08-26 06:48:36 · 8 answers · asked by Anonymous

i pour out water at the length of 3 meters, after a moment it divides into small drops, how
can i make it move only in one direction?
http://www.aquatic-show.com/site/More-photos-of-Aqua-graphic-44.html

2007-08-26 06:47:09 · 2 answers · asked by majidf_elc 1

my question is do u agree? and if so then explain why you do. a paragraph please(5 -7 sentences). person who gives most details and is very insightful gets the "Best Answer."

2007-08-26 06:32:27 · 3 answers · asked by Anonymous

What I'm trying to ask is: Why a half circle instead of a straight line or a wide field of color?

2007-08-26 05:55:41 · 9 answers · asked by Anonymous

my question is do u agree? and if so then explain why you do. a paragraph please(5 -7 sentences). person who gives most details and is very insightful gets the "Best Answer."

2007-08-26 05:53:31 · 5 answers · asked by Anonymous

2007-08-26 05:50:34 · 2 answers · asked by a s 1

the objectives on a microscope? your hand or is their a knob?

2007-08-26 05:19:17 · 1 answers · asked by Terri L 2

fill in the blanks

WAVELENGTH: Light - Color, Sound - ?
AMPLITUDE/INTENSITY: Light - Brightness, Sound - Loudness
FREQUENCY: Light - ?, Sound - Pitch

2007-08-26 04:53:25 · 3 answers · asked by MatT 7

Object A has a charge +2μC and object B has a charge of 6μC. Which statement is true?

I'm not sure about the condition of the 6μC charge, so please indicate the answer (a, b, c or d) in both conditions: (6μC and -6μC). THanks a lot!

A. Fab = - 3 Fba

B. Fab = - Fba

C. 3 Fab = - F ba

D. F ab = 3 F ba

2007-08-26 04:50:49 · 3 answers · asked by MatT 7

How do scientists figure out how far a light came from. As they say we are still getting light from billion of years away from big bang time. Is that light like the light from the stars we see at night?

2007-08-26 04:23:40 · 5 answers · asked by elearner 1

Calculate the current in a 140-W electric blanket connected to a 120-V outlet.

2007-08-26 03:31:24 · 5 answers · asked by boy101 3

Would the Earth shake? What would happen?

2007-08-26 03:04:06 · 6 answers · asked by DiMooch 3

A rabbit is running on a straight line with velocity v=2m/s. A wolf is lying 40m from the line .The moment the rabbit is 40m far from the wolf , the wolf realizes it and starts to pursue it with v=2m/s .After 40 seconds, what is the minimum distance between them?

This is what I did:

displacement= Velocity x time--> 2 m/s x 40 s= 80 m

this is for the rabbit since it runs at a constant velocity throughout the run/chase

The wolf however starts from rest than accelerates to 2m/s and pursues rabbit therefore
displacement= avg. velocity x time= Vi+Vf/2 x time= 0+2m/s /2 x 40 s= 40 m

The minimum distance between the wolf and the rabbit after 40s is 80m-40m= 40m

The answer is not 40 meters and I don't know what else it can be. Please help!

2007-08-26 03:00:29 · 2 answers · asked by Kiwikahuna 2

Its not matter, Its produced by burning matter. Its not an energy, it gives out energy- heat and light. My physics teacher told me everything is either matter or energy but fire doesnt seem to be either

2007-08-26 02:57:47 · 14 answers · asked by Jimmy c 1

2007-08-26 02:44:06 · 5 answers · asked by bella f 1

2007-08-26 02:42:02 · 6 answers · asked by bella f 1

2007-08-26 02:40:53 · 8 answers · asked by bella f 1