Physics - October 2007

if all energy never dies but transforms and ghost are energy, or risdual energy , time waves whatever you want to call them

why is it we never hear or see ghost from more that 2-3 hundred years ago

certainly people had ghost sightings in acient times why don't we see or hear or ancient haunting....

IE
human in year 1700 dies , human becomes ghost or whatever due to never ending energy, time warp..actual haunting
now
ancient Roman dies , but no modern day ghost sighting

does energy of this sort continue to transfrom, and if so does it mean in a few hundred years ghost sighting that seem to be from victorian times will be gone.

2007-10-24 18:06:07 · 3 answers · asked by la de da 3

The Peltier effect is the reverse of the Seebeck effect; a creation of a heat difference (between two joint) from an electric voltage.

This temperature difference gives rise to a seebeck voltage which is opposite the voltage of the battery. So we can resonably conclude that it can contribute to the loss of voltage of the battery, can't we?

2007-10-24 17:36:17 · 1 answers · asked by Anonymous

Should kinetic energy be conserved in all cases - according to physics theory? Explain your answer.

2007-10-24 17:30:26 · 1 answers · asked by Anonymous

So below is the problem and I want to know how to find the location of the center of mass. The book I have is not very clear on the fact of 3-D objects.

Figure 9-27 shows a cubical box that has been constructed from metal plate of uniform density and negligible thickness. The box is open at the top and has edge length 40 cm. Find the coordinates of the center of mass of the box.
______cm (x-coordinate)
______cm (y-coordinate)
______cm (z-coordinate)

Link to image: http://www.webassign.net/hrw/09_33.gif

2007-10-24 17:20:04 · 3 answers · asked by eggyu74 3

2007-10-24 16:51:46 · 2 answers · asked by Anonymous

Situation: There is no wind. On Earth, at an altitude of 50 m over sea-level.

1) You drop a dictionnary ( 1kg) and a kleenex box (0.5 kg) of the same volume.

2) You drop a basketball ( 5 L) and a steel ball ( 1L ) , which both have same mass.

3) You drop a basket-ball ( 1kg, 5L ) and a tennis ball ( 0.1 kg, 0.5 L)


Which will hit the ground first. Explanations would be appreciated

2007-10-24 16:24:10 · 9 answers · asked by Anonymous

O.K., here's an easy one...

At the same time that a high-speed bullet is fired horizontally from a rifle, another bullet is simply dropped from the same height. Which bullet strikes the ground first?

a) The dropped bullet
b) The fired bullet
c) Both strike at the same time

2007-10-24 16:19:15 · 9 answers · asked by ? 6

What minimum speed must you give the pail at the highest point of the circle if no water is to spill from it?

2007-10-24 15:56:00 · 5 answers · asked by Anonymous

i don't care on how the friggin earth moves!!!
why should i learn this if im not going to use it in my life????
grrrrr!

2007-10-24 15:48:53 · 9 answers · asked by ¬¬ 5

I need this Today ASAP!!!

2007-10-24 15:46:16 · 4 answers · asked by Anonymous

I have to take it next semester, but there are no reviews for the professor I have to take. I just want to have an idea of what to expect.Thanks

2007-10-24 15:44:44 · 4 answers · asked by Anonymous

I've heard an urban myth that if your car is stuck somewhere with a dead battery, you cold start rubbing the negative battery post with nylon cloth to build up static electricity that will eventually charge the battery. I'm sure this is remotely true.

But how about one of those survival flash lights that you shake back and forth to generate electricity? If you take the flash light apart and connect the positive from the flash light to the positive of the battery and the negative to negative........ how many days do you think one will have to be standing there shaking the flashlight back and forth in order to charge the car's battery enough to make it spin the starter?

2007-10-24 15:28:14 · 2 answers · asked by Anonymous

Bob can throw a 500 g rock with a speed of 30m/s. He moves his hand forward 1.0 m while doing so. What is Bob's maximum power output as he throws the rock?

2007-10-24 15:17:29 · 2 answers · asked by rochesmk 2

A horizontal net force of 210 N is exerted on a 2.0 kg discus as it rotates uniformly in a horizontal circle (at arm's length) of radius 0.90m. Calculate the speed of the discus.

2007-10-24 13:43:40 · 1 answers · asked by LabStudent0 1

Can someone help me solve this problem?

In bench pressing 105 kg, a weight lifter applies a force of 1049.3 N. How large is the upward acceleration of the weights during the lift?

2007-10-24 13:43:35 · 1 answers · asked by Anonymous

how is speed measured?

2007-10-24 13:21:09 · 2 answers · asked by Sarah S 3

can anyone compare the xray production in the xray tube VS a linear accelerator?

2007-10-24 13:14:27 · 1 answers · asked by Kel 1

Also, how can an object that is speeding up have a negative acceleration?

Give an example of both please...thank you!!!

2007-10-24 13:13:03 · 7 answers · asked by cooldude123 2

Water is pumped from a well of 6.0m deep at a rate of 45L/min. Calculate the power needed to do this if the water leaves the pump at a negligible speed and 1 L of water has a mass of 1kg.

2007-10-24 12:59:02 · 1 answers · asked by S D 2

2007-10-24 12:48:22 · 1 answers · asked by kika1987 1

What is the wavelength of a 1024Hz tuning fork?

2007-10-24 12:38:49 · 5 answers · asked by always.askin 2

the force acting on the object is conservative?
there is a single, unbalanced internal force acting on the object?
the mechanical energy is conserved?
none of these?

2007-10-24 12:38:17 · 1 answers · asked by pcphil68 2

2007-10-24 11:54:24 · 4 answers · asked by Anonymous

2007-10-24 11:48:24 · 2 answers · asked by qt_pitutie1564 2

Why don't groups of protons form nuclei without neutrons?

Since the strong nuclear force is stronger than the electrical repulsion, shouldn't 2 or 3 or many protons stick together? Why don't we ever find He-two, or Li-three, or U-92 atoms? Why must two protons also have two neutrons to form a stable He nucleus?

2007-10-24 11:24:56 · 10 answers · asked by Jeffrey K 7

What are the theories of time and why it passes?

2007-10-24 11:06:49 · 2 answers · asked by Angel 4

A force of 715N stretches a certain spring a distance of 0.155m .Take the free fall acceleration to be = 9.80m/s^2 .

2007-10-24 11:01:42 · 2 answers · asked by Natiphy2007 1

when u explain please give an answer in detail or give a website this is a homework queastion from science

2007-10-24 10:58:41 · 3 answers · asked by Anonymous

I don't understand how speakers can produce and how we can hear more than one sound or frequency at a time.

2007-10-24 10:53:07 · 3 answers · asked by Anonymous

2007-10-24 10:22:12 · 6 answers · asked by qignis 2