Physics - November 2006

2006-11-16 00:45:37 · 7 answers · asked by Anonymous

List three methods that can be used to reduce noise pollution.
Thanks for all you do for me, Clint

2006-11-16 00:25:47 · 4 answers · asked by cetinnovations 1

If the velocity of sound in a certain metal is 510 meters per second and the wavelength is 20, what is the frequency of the wave?
can any body give me the formula for this aswell

2006-11-16 00:22:27 · 5 answers · asked by cetinnovations 1

seraphs are described as having 6 wings, with 2 he kept his face covered, with 2 he kept his feet covered and with 2 he would fly about.

cherubs are said to be head-only creature with small wings.

2006-11-15 23:29:45 · 4 answers · asked by dream reality 2

If you shoot a firework into the air and it hits it's maximum height in 7 seconds and explodes sending fragments scattering in horizontal directions all around at a speed of 20 meters per second then (assume that air drag is negligible):

It would only take the fragments 7 seconds to fall right?
A)What will be the acceleration of the fragments as they fall vertically?

B)What is the path of the fragments as they fall to the ground?

C)Why do the fragments follow this path?

Please explain how you figured these out.I'm trying to learn but it's so confusing.

2006-11-15 23:27:16 · 2 answers · asked by cult_king_666 1

2006-11-15 23:23:02 · 13 answers · asked by gireesh 1

Two thin rectangular sheets (0.06 m* 0.46 m) are identical. In the first sheet the axis of rotation lies along the 0.06 m side, and in the second it lies along the 0.46 m side. The same torque is applied to each sheet. The first sheet, starting from rest, reaches its final angular velocity in 7.4 s. How long does it take for the second sheet, starting from rest, to reach the same angular velocity?

2006-11-15 23:16:24 · 2 answers · asked by Alan l 1

A CD has a mass of 17 g and a radius of 6.0 cm. When inserted into a player, the CD starts from rest and accelerates to an angular velocity of 22 rad/s in 0.88 s. Assuming the CD is a uniform solid disk, determine the net torque acting on it.

2006-11-15 23:14:44 · 2 answers · asked by Alan l 1

2nd law of thermodynamics says that energy "spreads out" to try to reach equlibrium. My understanding is that it's like a gas which spreads out to fill the room it's in. Then why hasn't the universe reached a state of equilibrium? 2nd law says processes are irreversible. Does physics also say there is reversability in the universe? That's my only explanation.

2006-11-15 22:52:12 · 1 answers · asked by magpiesmn 6

Is it possible to create an environment where echoes are able to resonate forever? Or if not an environment where an echo would last for hours if not days, and then be extracted at a later date.

2006-11-15 22:03:10 · 8 answers · asked by Nathan 2

2006-11-15 21:54:44 · 9 answers · asked by cult_king_666 1

a grandprix racer completes a 500km race in exactly 2hr and 15mins. wat is d average speed in km/hr and m/sec

2006-11-15 21:29:15 · 7 answers · asked by h0neyjh0y26 2

wat is d displacement of a shopper in a downtown mall who firat walk 100m straight east and then walks 125m straight west

2006-11-15 21:00:43 · 9 answers · asked by h0neyjh0y26 2

how long does it take the firework to hit the ground?

2006-11-15 20:37:46 · 2 answers · asked by cult_king_666 1

2006-11-15 20:29:52 · 7 answers · asked by conda 6

plz answer my question now you can help me to be valedictorian

2006-11-15 19:36:22 · 4 answers · asked by camsimyu 1

If so, does this involve the same principle as sticking a female opera singer in a room full of glasses on shelves and asking her to sing in as high and loud a pitch as she can?

2006-11-15 19:21:20 · 5 answers · asked by cragoogle 1

2006-11-15 19:01:05 · 12 answers · asked by Anonymous

2006-11-15 18:27:39 · 6 answers · asked by Parth 1

2006-11-15 18:24:09 · 2 answers · asked by Bananamanao 2

I was wondering I have heard some rummers about using electricty to hover. Does anybody know if it is true? And if so how does it work?

2006-11-15 16:56:11 · 5 answers · asked by awbbie 2

You have an airplane sitting on a moving runway (not fixed). The runway is like a treadmill, and it matches the speed of the plane but in the opposite direction. Can the airplane take off or not? Note that this is a tricky question.

2006-11-15 16:37:00 · 7 answers · asked by Enrique C 3

, and
to a rotation axis at O, by two thin rods, each with length d= 5.6 cm and
mass M= 1.2 kg. The combination rotates around the rotation axis with
angular speed= 0.30 rad/s. Measured about O, what are the combination's: (A) rotational inertia
(B) kinetic energy

2006-11-15 15:55:07 · 1 answers · asked by gods1princesschanel 1

L1+ L2, with L1= 20 cm and L2= 80 cm. The rod is held
horizontally on the fulcrum and then released. What are the magnitudes of
the initial accelerations of (a) particle 1 and (b) particle 2?

2006-11-15 15:52:57 · 1 answers · asked by gods1princesschanel 1

2006-11-15 15:47:21 · 10 answers · asked by waqas hero of chep 1

2006-11-15 15:47:00 · 3 answers · asked by Anonymous

I would appreciate any helpful input on this physics problem. I am really confused on this one. Thanks for any help :)

A high-speed lifting mechanism suppports a 815 kg object with a steel cable 28.0 m long and 4.00 cm2 in cross-sectional area.

a) Determine the elongation of the cable (in mm).

b) By what additional amount does the cable increase in length if the object is accelerated upward at a rate of 2.7 m/s2 (in mm)?

c) What is the greatest mass that can be accelerated upward at 2.7 m/s2 if the stress in the cable is not to exceed the elastic limit of the cable, 2.2 x 10 to the 8th power Pa (in kg)?

2006-11-15 15:43:50 · 2 answers · asked by Anonymous

how does electricity produce magnetism

2006-11-15 15:32:42 · 3 answers · asked by ariel 1

Rather than a force being aplied to a single mass?

2006-11-15 15:18:15 · 2 answers · asked by goring 6

I could really use any help on this problem that anyone could give me. Thanks in advance. I will give 10 points if anyone can help me out.

A space station shaped like a giant wheeel has a radius 96 m and a moment of inertia of 5.08 108 kgm2. A crew of 150 lives on the rim, and the station is rotating so that the crew experiences an apparent acceleration of 1 g (there is a figure linked at the bottom). When 100 people move to the center of the station for a union meeting, the angular speed changes. What acceleration is experienced by the managers remaining at the rim? Assume that the average mass of each inhabitant is 65.0 kg. The answer is in m/s squared

http://www.webassign.net/sercp/p8-54.gif

2006-11-15 15:16:12 · 1 answers · asked by DJ 1