Physics - February 2007

Luckily, the teaching assistant did not throw the lab report in the trash. If the trash can is 40m away from her desk, at approximately what angle would she need to throw the lab report so it would reach the trash can?

2007-02-13 09:04:43 · 1 answers · asked by Anonymous

two of my dreams is to become a singer and a actress will they come true?

2007-02-13 08:48:41 · 8 answers · asked by kaliyah j 1

The speed of light is 3.0×108 m/s and the speed of sound is 3.4×102 m/s. Find the value of the integer 'n' in the following statement:
If you start counting seconds when you see something happen and stop when you hear it happen, for every 'n' seconds counted the event was about 1km away.

2007-02-13 08:39:07 · 3 answers · asked by avemaria 2

When we look at the cosmos we are looking back in time becuase light takes time to travel a distance. What if we were to place a mirror 1 light year away, looking into it and seeing our reflection we would be seeing ourselves as we were 2 years earlier. Theoretically, could you do this at different distances and see different stages of the earth? Is there some object that could exist that is reflecting the light from earth that could allow us to actually view it being formed?

2007-02-13 08:32:05 · 10 answers · asked by E 5

I know if I leave a bucket of water outside at this time of year, it would certainly freeze in no time at all. I know a lot of trailer houses have trouble keeping their water line from freezing. But I have never heard of a city, serviced by a water tower, be without water due to the water in the tower freezing.

2007-02-13 08:26:00 · 11 answers · asked by BigV340 2

Figure P3.60 illustrates the difference in proportions between the male (m) and female (f) anatomies. The displacements 1m and 1f from the bottom of the feet to the navel have magnitudes of 104 cm and 84.0 cm, respectively. The displacements 2m and 2f have magnitudes of 50.0 cm and 43.0 cm, respectively.

(a) Find the vector sum of the displacements 1 and 2 in each case.
(b) The male figure is 180 cm tall, the female 168 cm. Normalize the displacements of each figure to a common height of 200 cm, and re-form the vector sums as in part (a). Then find the vector difference between the two sums.

2007-02-13 08:12:19 · 3 answers · asked by Kacey L 1

two automobiles are equipped with the same single-frequency horn. when one is at rest and the other is moving toward an observer at 15m/s, a beat frequency of 5.5Hz is heard

2007-02-13 07:52:50 · 1 answers · asked by Anonymous

2007-02-13 07:37:03 · 2 answers · asked by Prasun M 1

im an engineer and you guys piss me off with stupid imperial bs
should go to metric like the rest of the world it makes it so much easier when your ordering i beams and tubing and well what ever makes it way more easier and accurate

2007-02-13 07:29:35 · 5 answers · asked by Anonymous

can you explain the higher pressure and lower pressure


http://www.madamandeve.co.za/imgs/eve_vacuuming.gif

2007-02-13 07:26:47 · 2 answers · asked by beauty mirna 3

2007-02-13 07:20:36 · 10 answers · asked by Eric L 2

A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 7.90 m/s at an angle of 17.0° below the horizontal. It strikes the ground 4.00 s later.
Find the height from which the ball was thrown.

I cannot get the correct answer using the standard constant accel equations. Not sure what I am doing wrong.

2007-02-13 07:12:38 · 5 answers · asked by Matt F 1

I'm trying to develop an inexpensive solar cooler for camping.

I've made a solar box COOKER before, using nested cardboard boxes painted black, with aluminum foil glued on the inside. The black surface absorbs heat from the sun's rays, while when the heat is re-emitted inside, the reflective foil tends to keep it in. It is a slow cooker which can develop about 325 degrees F.

Now I am thinking about trying the same idea inverted. I know I won't be able to freeze things. but if I start with something frozen, could I keep it frozen this way without having to use those pre-frozen plastic containers of blue chemical?

Anybody ever make a cooler like this? anybody know how? Any sites for plans? (not the cooker sites, I already have those.)

Please include ideas for evaporative cooling using wet towels, if that has worked for you in the past. I'm trying to do this no-electricity, no chemicals, no bottle of gas. I want to travel light.

Thanks!

2007-02-13 07:07:59 · 2 answers · asked by cdf-rom 7

As I want a sample of superconductor material for my project.

2007-02-13 06:21:00 · 2 answers · asked by Vikas K 1

2007-02-13 06:20:21 · 9 answers · asked by Amber H 1

Are we ever gonna find away to use it, or are we just gonna keep storing it places? and are those places or storage methods going to change

2007-02-13 06:17:17 · 2 answers · asked by TheA 1

2007-02-13 06:13:54 · 7 answers · asked by Clark Kent 1

The engine in an imaginary sports car can provide constant power to the wheels over a range of speeds from 0 to 70 mph. At full power, the car can accelerate from zero to 32.0 mph in time 1.50 s. At full power, how long would it take for the car to accelerate from 0 to 64 mph? Neglect friction and air resistance.

Thanks for the help!

2007-02-13 05:51:20 · 6 answers · asked by Amanda 2

A steel ball rolls down a ramp (like a "ski jump"), leaves the ramp in the horizontal direction with 0.829m/s and falls to the ground which is 91.2cm below the ramp. How far in the horizontal direction does the ball move ?

the answer is 0.357464, but can someone please do it step by step

2007-02-13 05:29:33 · 4 answers · asked by Paul S 2

A steel ball rolls down a ramp (like a "ski jump") and leaves the ramp in the horizontal direction. You measure the speed of the ball with a photogate and a timer (your computer). The computer records the time the light beam of the photo gate is blocked by the ball, when moving through the gate. The recorded time is 6.94ms (NOTE ms = mili second). What is the speed of the ball if the width of the ball blocking the light beam is 1.002cm ?

The answer is 1.443804, but how do u do it?

2007-02-13 05:26:30 · 3 answers · asked by Paul S 2

a particle in a uniform motion in a straight line has a velocity of 30m/s at a point p and a velocity of15m/s at another point q.It comes to rest at another point r. If the distance between pandq is 800m calculate the distance between q and r and the time taken to come to rest from q

2007-02-13 05:23:02 · 1 answers · asked by goldengal 2

ship. Somehow... they had legs and arms sticking out of solid steele parts. I've heard of this SEVERAL TIMES, but it was some sort of military experiment with black holes that went wrong. Does anyone know of which experiment I'm talking about. Whenever I have seen shows on this, it was talking about this experiment as if it were documented, but then the documents disappeared, so it was never considered a factual thing... Let me know if you know what Im talking about. Thanks

2007-02-13 05:21:57 · 11 answers · asked by Angel Eve 6

And if so, then why is light and the color spectrum often included in charts of the RF spectrum?

2007-02-13 05:21:27 · 3 answers · asked by Tyrone 2

a. 0.042 cm3
b. 0.41 cm3
c. 24 cm3
d. 1680 cm3

2007-02-13 05:08:51 · 4 answers · asked by kacwccj 3

2007-02-13 05:01:18 · 7 answers · asked by clueless 1

Absolute Zero (0K)(-273....C) is the Temp at which all elements, compunds etc. are in a solid state, so then why are nebulae and other things in space refered to as gas clouds????

2007-02-13 05:00:10 · 8 answers · asked by Ash 2

2007-02-13 04:58:36 · 8 answers · asked by isis 4

2007-02-13 04:53:34 · 42 answers · asked by Anonymous

2007-02-13 04:52:37 · 36 answers · asked by Andrew E 1

Slippery Brick
Intel to reveal 80-core supercomputer processor
DigiTimes - Feb 12, 2007
Intel on February 12 announced that its researchers have developed the world's first programmable processor to deliver Teraflop (one trillion calculations per second) performance from a single, 80-core chip.

I have a hard time imagining one trillion of anything. (Except maybe cells.)

2007-02-13 04:43:55 · 6 answers · asked by isis 4