Physics - December 2007

What I 'm getting at is: Has it ever been constructed and by which countries?

2007-12-10 02:17:59 · 8 answers · asked by The Loiterer 3

I have an electrical problem:

I find that the tube light in my room does not switch on (it keeps flickering) in the evenings. This happens usually in the period 6-9pm. The rest of the time it acts perfectly fine. What might be the problem? It cannot be due to excess loading from my house since even though I switch off all other lights in my house this still continues to flicker. Repeatedly switching on and off does not help either..

How may I overcome this.? I'm curious to know what exactly is happening...

2007-12-10 01:14:33 · 3 answers · asked by karthik s 2

2007-12-10 01:13:24 · 6 answers · asked by ken d 1

A 36 Kg child is in a swing that is attached to ropes 2.10 m long. The acceleration of gravity is 9.81 m/s^2. Find the gravitational potential energy associated with the child relative to the child's lowest position under the following conditions:

a) when the ropes are horizontak
b) when the ropes make a 32.0 angle with the vertical
c) at the bottom of the circular arc

2007-12-09 18:54:12 · 2 answers · asked by Gladys 1

2007-12-09 18:45:34 · 14 answers · asked by john a 2

we did an experiment involving GPE and i am trying to understand our equation. We launched a cart up a ramp with a spring and have graphed the height the cart went and then the mass of the cart and got an equation of h=A/m where A=22m

now we did a little inclass and from all the experiment we use GPE =18mz, so i am thinking the A being 22 is close to 18, but there is some conversion present in there and cant figure it out. any help would be appreciated.

thanks

2007-12-09 18:44:02 · 2 answers · asked by ukreking2003 1

An airtight box has a removable (massless) lid of area 2·10-2 m2. A lid is placed on it while it is on top of a mountain (where Patm=0.87·105 Pa). It is then taken to sea level, where Patm = 1.013·105 Pa. How much force will be required to remove the lid?

2007-12-09 18:04:54 · 1 answers · asked by =P 6

A person wears a hearing aid, which makes a sounds louder by 10 dB.

This means the sound intensity is increased by how many times?

This means the amplitude of the soundwave is increased by how many times?

2007-12-09 17:54:36 · 1 answers · asked by =P 6

A 92 kg man lying on a surface of negligible friction shoves a 71 g stone away from himself, giving it a speed of 4.0 m/s. What speed does the man acquire as a result?

answer should be in meters per second

2007-12-09 17:21:45 · 4 answers · asked by xoxo-oth 2

How would you describe when and why you would have to use the galilean transformation when dealing with two reference frames with the same constant velocity?

2007-12-09 17:19:33 · 1 answers · asked by Fantasy Football Guru 27 3

A person doing a chin-up weighs 770 N, disregarding the weight of the arms. During the first 24.0 cm of the lift, each arm exerts an upward force of 386 N on the torso.

2007-12-09 16:43:02 · 2 answers · asked by Anonymous

If you had a time machine and you could travel to one time period, (excluding the future) to live there permanently, when would it be?

2007-12-09 16:39:45 · 7 answers · asked by Anonymous

How would rotation help an object as it falls? Why is it helpful to do this? What about torque?

2007-12-09 16:17:25 · 1 answers · asked by monkey_king122 2

parallel universe or Multiverse is the concept of Quantum physics these days, does anyone of u believe it? and can anyone explain more about it?

2007-12-09 15:41:37 · 28 answers · asked by Anonymous

At which point(s) does the mass on a vibrating spring have its largest velocity? Smallest velocity?


Or if anyone knows the answer to either of these questions, much appreciated as well. Our physics teacher isn't the best at explaining things.

If the amplitude of the vibration of the spring is doubled, what happens to the period?

If a stiffer spring were used so that the spring constant were 4 times as great, how would the frequency and period be affected?

2007-12-09 15:40:52 · 1 answers · asked by Anonymous

Suppose that you start with a charge of 0.002 C, and find that it takes 24 J of work to move it from point A to point B. Now what is the voltage difference between points A and B?

If this charge is release, what will be its kinetic energy as it flies back past point A?

2007-12-09 15:22:26 · 2 answers · asked by Anonymous

You are not harmed by contact with a charged balloon, even though its voltage is very high. Is the reason for this similar to why you are not harmed by the greater than 1000 degrees C sparks from a Fourth of July sparkler?

2007-12-09 15:20:07 · 1 answers · asked by Anonymous

it's a gas giant and it has a gravitation ten times that of earth , how do they know these things

2007-12-09 15:15:12 · 8 answers · asked by alvin_vinson 1

is 'midnight'.. TOMORROW... or- TODAY ??

2007-12-09 15:00:25 · 7 answers · asked by chief5bass 1

what element would be produced?

2007-12-09 14:39:29 · 1 answers · asked by Anonymous

does most of its energy come from the fissioning of plutonium?

2007-12-09 14:38:44 · 1 answers · asked by Anonymous

2007-12-09 14:37:59 · 2 answers · asked by Anonymous

2007-12-09 14:36:59 · 4 answers · asked by nancy c 1

2007-12-09 14:28:01 · 7 answers · asked by Carolyn P 1

in a glass of water?

2007-12-09 14:18:29 · 1 answers · asked by Marie L 1

A 2% difference in atmospheric pressure exists between the underside and top of a roof during strong winds. Show that the resulting lifting force on a roof that has a projected horizontal area of 2000 m(squared) is more than 4 million N.

I know that pressure=force/area so.. force=pressure x area, but I do not seem to be getting the correct area. Any help please?

2007-12-09 13:38:13 · 1 answers · asked by aasdfjkl 1

A student of ECSU going on thanksgiving holiday drove a distance of 100 km due north from EC downtown for 50 mins, he stopped at a gas station to buy gas and use the bathroom for 10 mins, he then turned east and traveled a distance of 50 km for 20 mins. He stopped and visited a high school friend for 20 mins. Then he continued his journey by traveling south, another 50 km for 20 mins. And then turned west and traveled 50 km for 15 mins before getting home.

(a) What is the average speed for the entire journey is m/s?
*Could you please show how you got it?

(b) What is the magnitude of the average velocity in m/s?
*Please show work.

(c)In what direction is the average velocity?

2007-12-09 12:47:09 · 1 answers · asked by Rasheena E 1

I was asked to find the experimental weight of a meterstick on a support with a mass on one side.

heres what i did:
Torque left= Torque right
(Fw)(Pivot Point- Center of Gravity)=(Weight of Mass)(Location of mass-Pivot point)

(Fw)(.65-.499)=(2.1152322)(.732-.65)
.151Fw=.300056792
Fw=1.987131073 N

The actual weight is 1.28184 N. So the percent error is like 55% which is way to high. As long as i did the problem right my teacher might understand. Please help me!!

2007-12-09 12:25:21 · 2 answers · asked by Andy D 3

a 2 kg mass moves to the right at 2m/s and collides with a 6 kg mass moving to the left at 4m/s. if the collision is completely inelastic, what is the common velocity of the two masses after they collide, and how much energy is lost in the collision?

2007-12-09 12:17:48 · 1 answers · asked by Anonymous

A dolphin located in seawater at a temperature of 25°C emits a sound directed toward the bottom of the ocean 140 m below. How much time passes before it hears an echo?
______s

2007-12-09 12:05:33 · 1 answers · asked by Ashley S 1