Physics - June 2007

2007-06-27 22:21:03 · 3 answers · asked by manvesh n 1

2007-06-27 22:17:00 · 9 answers · asked by Moanika 6

Suppose you can make the thoughts projected,we can travel faster than light.We can also get ideas into form, we can communicate better.

2007-06-27 22:00:46 · 4 answers · asked by IIdea 1

2007-06-27 21:47:41 · 5 answers · asked by PETER 1

Is it actually possible to bend a spoon with the mind ? If so, how is it explained?

2007-06-27 20:45:46 · 6 answers · asked by Mike R 2

If a permanent magnet is allowed to hang from an overhead steel plate, the magnetic field resisting the pull of gravity holds the magnet to the beam. Energy seems to be created?

If an electromagnet is energized with adequate current it creates a force that can attach a magnet to an overhead plate, it uses energy constantly.

Does this mean that magnets defy the conservation of energy law by creating energy?

2007-06-27 20:30:33 · 7 answers · asked by oneirondreamer 3

a block of mass 0.5 kg is pushed against a horizontal spring of negligible mass, compressing the spring a distance of delta x. the spring constant is 418 N/m. when released, the block travels along a prictionless, horizontal surface to point B, the bottom of a vertical circular track of radius 0.4 m, and continues to move up the track. the speed of the block at the bottom of the track is 14 m/s and the block experiences an average frictional force of 6 N while sliding up the track. the acceleration of gravity is 9.8 m/s^2

a) what is delta x?? in units of m

b) what is the speed of the block at the top of the track? in units of m/s

c) what is the centripetal acceleration of the block at the top of the track? in units of m/s^2

2007-06-27 19:01:09 · 2 answers · asked by claudia 1

What is the shape of the universe,and does it have no end?

2007-06-27 17:47:49 · 10 answers · asked by Life goes on... 6

The problem is:

Venus rotates slowly about its axis, the period being 243 days. The mass of Venus is 4.87x1024 kg. Determine the radius for a synchronous satellite in orbit about Venus.

I'm not even sure what equation to use...

2007-06-27 17:28:51 · 2 answers · asked by Anonymous

thrust and pressure.

2007-06-27 17:06:39 · 3 answers · asked by LEE 1

thrust and pressure

2007-06-27 17:05:15 · 3 answers · asked by LEE 1

2007-06-27 16:29:10 · 5 answers · asked by franklin z 2

Must I really travel to the 24th century to retrieve a new unit?

2007-06-27 16:28:11 · 7 answers · asked by buzzfeedbrenny 5

98.6 degrees seems like a precise temperature for the human body. what controls this temperature and how did evoloution design & arrive at this exact temperature? what would happen if it was 92.8?

2007-06-27 16:15:53 · 4 answers · asked by james h 2

The rate at which the acceleration of an object changes with time is called the jerk?

2007-06-27 16:15:08 · 5 answers · asked by Tam 1

Approximately one billion years ago, the Moon orbited the Earth much closer than it does today. The radius of the orbit was only 24 400 km. Today, the radius is 385 000 km. The orbital period was only 23 400 s. The present period is 2.36 x 10 to the 6th power s. Assume that the orbit of the Moon is circular.

2007-06-27 16:12:43 · 2 answers · asked by Tam 1

A police truck is in pursuit of a stolen pickup truck. At one instant, the car has a speed of 34 m/s and is 164 m behind the truck. At the same time, the truck has a speed of 32 m/s.

2007-06-27 15:19:19 · 1 answers · asked by adrianterrellhogan 1

2007-06-27 15:13:00 · 13 answers · asked by Paradox 3

Can science only describe and never explain? For example, can science tell us why light travels at 186,000 miles per second and not 176,000 miles per second or why subatomic particles either attract or repel one another?

2007-06-27 15:04:17 · 7 answers · asked by marc 2

A rigid container contains 1.0 mol of an ideal gas that slowly receives 2.0 × 10^4 J of hear.

Is the work done by the gas
(a) Positive
(b) Zero
(c) Negative

Why?

Is a net amount of hear added to or removed form the system and how much is involved?

2007-06-27 15:00:54 · 1 answers · asked by Concerned 1

Also, I was wondering how exactly a fan blade does its job- does it catch the air, does it create a vacuum effect, pulling the air forward, what exactly is that piece of plastic doing to move those air molecules? Does it work on the same principle of an airplane's wing?





ALSO: If the temperature is the average kinetic energy, why does the air feel COOLER when it is moving FASTER than the air around it? Is it that the air flow is absorbing the heat energy, and more air is coming to absorb more?

2007-06-27 13:52:59 · 3 answers · asked by Adeel 4

2007-06-27 13:43:50 · 7 answers · asked by larrymels 1

Hi. I just finished calculus, and I want to learn vector calculus. So today, I read some stuff on del operators and partial derivatives and I think I understand that ...but I don't know ...
Can somebody PLEASE just explain gradient operators in extremely simple terms that someone with just basic calculus can understand. ..I don't need to have an in depth understanding, I just want to be able to have fun with it because I'm bored right now and that sounds super sweet ....like try to do basic work/energy problems using it ...but I'm not sure exactly how it works ...

Can anybody spare me the technical stuff and show me how to do it in basic terms??

thaks

2007-06-27 13:34:29 · 2 answers · asked by Anonymous

2007-06-27 13:26:29 · 3 answers · asked by Mercury 2010 7

2007-06-27 12:40:26 · 6 answers · asked by raybbies 5

Three building materials, plasterboard (k=0.30 J/ s.m. C degrees), brick (k=0.60 J/ s.m. C degrees), and wood (k=0.10 J/ s.m. C degrees) are sandwiched together. The temperatures at the inside surface is 27 degrees celcius and 0 degrees celcius on the outside. each material has the same thickness and cross sectional area. Find the temperature
(a) at the plasterboard brick interface and
(b) at the brick wood interface

i'm not sure how to work this problem...

2007-06-27 12:20:16 · 3 answers · asked by chly1459 1

please only true scientific answers.
I have some Unobtainium 345 in my Garage and wondering how to keep the kids away, and my dog Woofer from sniffing or peeing on the container?

2007-06-27 12:18:25 · 9 answers · asked by Anonymous

If time gradually slows down to the point of matter or time never reaching a black hole. What is in a black hole? What speed does "time" travel?

2007-06-27 12:06:50 · 4 answers · asked by Anonymous

how do I know if an x momentum can beat a y presure resistance?

2007-06-27 11:46:59 · 3 answers · asked by aoc10010001100 2

From a "Black Hole" looking OUT, not with our eyes obviously (but theoretically) What would we see? It wouldn't be black would it? because light is captured too. & what happens to photons?

2007-06-27 11:21:53 · 9 answers · asked by Anonymous