Physics - August 2007

Horizontal thin rod of mass 10kg is hanging under the roof supported by friction μ=0.600 from the sides of the roof, and nothing else:

- - - -/^\
- - -/- - -\
- -/=rod=\
-/- - - - - - -\

What is tension T in the rod?

2007-08-15 06:43:01 · 3 answers · asked by Alexander 6

2007-08-15 06:34:38 · 6 answers · asked by Cobell J 1

by extreme heat in the 100s of million degrees or extreme cold millions of degrees below zero?Could this explain the effects of a Nuclear Bomb?

2007-08-15 06:15:10 · 7 answers · asked by john 2

In other words; Is it possible to send messages faster than the "speed of light"? Has it been done already. .or are scientists still working on this? How is it done (if it's possible), etc? Thanks to all who respond to the question.

2007-08-15 05:49:59 · 6 answers · asked by ? 6

2007-08-15 04:35:14 · 8 answers · asked by Anonymous

As we lift a mass from the earth, it gains potential energy,; does its mass then increase; is that where the added potential energy is 'stored"

2007-08-15 04:04:43 · 7 answers · asked by modah 1

An Ant 2 cm long has a mass of .0003 kg and can lift 10 times its mass, in addition to the mass of its own body (it can lift a total of .0033kg)

A. If the ant were 100 times as large, how long would it be? Show calculations.

B. What would the mass of the giant ant be? Show calculations.

C. How much could the giant ant lift in kilograms? Show calculations.

2007-08-15 03:41:24 · 4 answers · asked by lala 2

2007-08-15 02:35:58 · 5 answers · asked by sadam 1

like when you go higher it gets colder. For example, outside an aeroplane or on mount Everest
*i thought the sun was hot..?*
any ideas?

2007-08-15 02:26:14 · 8 answers · asked by ... 4

Even miniscule amounts must never come into contact with matter and must be stored in a permanently suspended state. So it seems the more that's created the more difficult it becomes us to store without "human error" potentially obliterating the planet.

2007-08-15 01:11:11 · 4 answers · asked by i2planet 2

2007-08-15 00:44:53 · 13 answers · asked by cukie 1

I just had this question in my mind. So i think i require a precise answer with perfect explanations

2007-08-14 23:45:25 · 4 answers · asked by RAGHU VENKATESAN 1

If a nuclear device was detonated in the center of a F5 tornado or the strongest of current hurricanes, would the implosion nullifly the kinetic energy of the winds and appear as a normal explosion, or would it somehow change the look and effects (strength, temperature, etc.) of the nuclear device uppon the explosion?

2007-08-14 22:08:09 · 5 answers · asked by undeadgh0st 1

which is heavier a ton of feathers or a ton of bricks?

2007-08-14 21:54:42 · 20 answers · asked by Anonymous

2007-08-14 21:47:05 · 6 answers · asked by Nonnaline S 1

A steel plug has a diameter of 10000cm at 35 C.the linear expansion coefiecient of steel is 11x10^-6

2007-08-14 20:33:24 · 1 answers · asked by Shuji Ishikawa 2

Does string theory say that an electromagnetic field or a gravitational field is caused by particles such as gravitons?

What are all of these particles called in general(including gravitons)?

So does this mean energy is used up when creating an electromagnetic field?

2007-08-14 20:13:46 · 6 answers · asked by spacebendingguy 1

2007-08-14 18:43:46 · 10 answers · asked by m m 1

17. A 60W incandescent light bulb is 5% efficient. A 60W fluorescent bulb is 15% efficient. How much more light will the florescent light bulb give off than the incandescent light bulb, in the same period of time?

2007-08-14 18:21:42 · 2 answers · asked by Anonymous

Im talking about..shielding the craft from the Earths gravitational field..and please,, dont tell me it cant be done...this question is strictly for those with an imagination..and those who try to think outside the box.

2007-08-14 17:28:40 · 4 answers · asked by Joseph 2

2007-08-14 17:15:58 · 3 answers · asked by Shashank B 1

2007-08-14 17:15:38 · 5 answers · asked by joseph j 1

2007-08-14 17:14:53 · 1 answers · asked by Shashank B 1

2007-08-14 16:46:11 · 6 answers · asked by sharon_nicu 1

example set tidal volume 750 ml , and tidal volume on patient data on vent will read lower or higher

2007-08-14 16:31:25 · 3 answers · asked by bamabarney2003 1

Suppose an open railroad car is rolling without friction in a vertically-falling downpour and an appreciable amount of rain falls into the car and accumulates there. Consider the effect of the accumulating rain on the speed, momentum, and kinetic energy of the car.

Question #1

The speed of the car will

a) increase
b) decrease
c) not change

Question #2

The momentum of the car will

a) increase
b) decrease
c) not change

Question #3

And the kinetic energy of the car will

a) increase
b) decrease
c) not change

2007-08-14 16:07:53 · 4 answers · asked by ? 6

Considering that the Sun emits significant X-Rays and Gamma Rays, most other stars should do that also. Is there a
way to make some kind of steerable X Ray Detector (and possibly Gamma Ray Detector ) like a satellite Dish?

2007-08-14 15:56:54 · 1 answers · asked by zahbudar 6

2007-08-14 15:43:39 · 29 answers · asked by direct2denver 2

I understand the concept that ground is the zero voltage reference point with respect to the rest of the circuit, but with the ground disconnected, will the circuit continue to function?

I was playing a bit with an small circuit, but I found out, even with ground disconnected, the circuit continues to work? Is this really the case or not? What's the reasoning behind this?

I was trying to justify it by thinking that the circuit continues to work because the electrons in the circuit haven't yet accumulated up to the point where the voltage would to equal. But that reasoning sounds pretty dubious because of how fast electrons move.

So what would be the logical explanation for the circuit to continue to function? thanks.

2007-08-14 15:31:04 · 3 answers · asked by Mystery of Life 2

If gravity and prisms can bend light, can air pressure and/or gravity bend sound? What would the result be?

2007-08-14 15:26:14 · 5 answers · asked by Mars 4