Physics - February 2007

Acricket ball of mass 20g moving with a velocity of 50 m/s. What will be its wavelength?
The answer is planck's constant 6.63 x 10 ^-34 . What is the scientific reason behind this?

And also an electron is moving with velocity 10 x 10^6 m/s. What will be its wavelength?

2007-02-23 03:50:46 · 3 answers · asked by Anonymous

Eg when two protons are accelerated and collide, producing protons as well as a proton-antiproton pair, what happens to the energy left over? I know it can be transferred to kinetic energy of the particles produced, what are the two other things that can happen to it?

2007-02-23 03:16:45 · 1 answers · asked by lykastar 3

This may sound like a stupid question, but what is the true nature of energy. I mean a wave would be considered immaterial, and it is a transfer of energy. However if energy is immaterial, how can it govern the way material things interact?

2007-02-23 03:08:32 · 11 answers · asked by Jacob L 1

the differences in the other lever oders

2007-02-23 02:43:24 · 3 answers · asked by NAINA 1

A particle moving at 10 m/s reverses its direction to move at 20 m/s in the opposite direction. If its acceleration is -10 m/s^2, what is the total distance that it travels?

A 15 m
B 20 m
C 25 m
D 30 m

Please don't just give me an answer. I need an explanation. Give me the reasoning. Thanks.

2007-02-23 02:41:12 · 3 answers · asked by Philippe 3

Obviously it wouldn't be fun for passengers, but can a DC-10, for example, fly high enough and with sufficient speed to achieve this feat that a fighter jet can easily do?

2007-02-23 02:38:46 · 5 answers · asked by Philip Kiriakis 5

Lito pushes a 100-kg box to the right while Mario pushes it to the left with a force of 300 N. How much force should Lito exert to allow the cart to move 1.5 m/s^2 against Mario?

2007-02-23 02:17:51 · 6 answers · asked by Anonymous

I ask because how an HID light bulb work is more by creating heat than using more energy to charge the bulb and when tuning on using a lot of battery power to discharge the ballast. And using to set of HID light bulb set in a car will damage any electrical component or dry the battery?

2007-02-23 01:48:07 · 3 answers · asked by Traqueteo de Centennial 1

Why is is when we use to put a cheap bottle of vodka in the freezer it would not freeze, but after taking it out of the freezer and opening it, it would be frozen 5 minuets later.

2007-02-23 01:36:20 · 3 answers · asked by Philip b 1

This is mostly based on what I remember from my science classes. I asked this question to a teacher back then and he was unsure about the outcome. Basically, if I remember correctly, every atom has a unique vibration pattern. Hydrogen does not vibrate in the same manner as oxygen does.

I also remember reading that if you have a sound (a specific vibration frequency) and that you emit the exact opposite frequency, the sound would be negated. This theory was also studied as means to reduce the impact of earthquakes.

What would happen to an atom if it were to be exposed to a vibration that is the exact opposit of its natural frequency?

My teacher said it could most likely be the absolute zero, or disintegration, or it could be any other results that he could not forsee.

2007-02-23 01:23:31 · 5 answers · asked by ryushinigami 3

2007-02-23 01:11:02 · 9 answers · asked by Anonymous

2007-02-23 01:06:57 · 1 answers · asked by bottleman532004 1

There is a significant current surge when you first switch on a filament lamp .
what's the theoretical model of this phenomenon ?
I assume that there is a huge different between ac & dc in this case .
some one told me that i should get help from faradic , or this formula : L( di / dt )
Please help me out !
I'm so confused

2007-02-23 00:59:56 · 3 answers · asked by Myself 1

with dwave, ibm and other firms boasting quantum computers, how much would one of these cost to own and operate?

2007-02-23 00:43:17 · 5 answers · asked by slacker 1

briefly tell me

2007-02-23 00:16:58 · 5 answers · asked by Stormy Knight 1

(Do you think my answer is correct 100%)?

-------------------
here goes my answer on a test today:
The sky is blue because of light diffraction , the nature of light and atoms and the biological and physiological aspects of the human eye .

2007-02-23 00:15:43 · 8 answers · asked by Ron 1

2007-02-22 23:54:41 · 2 answers · asked by on_the_bb 2

In field of nutrition and medication etc.

2007-02-22 23:46:24 · 2 answers · asked by Manz 5

what type of resister eg (10k,800ohm) would you need to change 4vdc to around 1.5 or 2???

2007-02-22 23:36:23 · 3 answers · asked by Mutley! 5

2007-02-22 23:33:11 · 13 answers · asked by Manz 5

a simple yet an amazing one and the needed materials are readily available

2007-02-22 23:29:16 · 3 answers · asked by mhaeylai_jhaymez06 1

2007-02-22 23:11:46 · 10 answers · asked by Anonymous

It is believed that earth is a magnet which attracts everything towards it like iron glass men etc. There is no example of any such magnet in our life that attracts all such things except iron. Then what kind of magnet it is ? This notion seems vague and it is understood that there is some other phenomenon which brings everything towards earth. What is that ?

2007-02-22 22:59:26 · 9 answers · asked by Manz 5

2007-02-22 22:38:44 · 8 answers · asked by rohitvijaysharma 1

My boss disagrees with the above statement and says it is the other way round.

2007-02-22 22:30:33 · 25 answers · asked by cheekychimponline 1

A beam of light in air is incident at an angle of 40 degrees on the surface of a transparent solid. The Light is deveated by 15 degrees toward the normal upon entering the solid. What is the critical angle for the total internal reflection from within the solid?

2007-02-22 22:27:50 · 2 answers · asked by ncaafan2 2

Suppose Jane {random i know} jumps of a building.

Jane leaps and expeirences free fall for 3 sec. Then the bungee cord begins to strech reducing herr speed to 0 in 2 secoundss. but jane doesnt die! Jane weighs 100 kg and acceleration is 10 m per secound. If time=0 secounds, what would be the velocity and the momentum if jane has not jumped off yet? what would it be if the time was 5 sec. Please i need help.

2007-02-22 22:08:17 · 4 answers · asked by boom boom 2

u'd say they r particles of light
but particles? is that ryt?
its said that light is a wave
argument of newtons theory and huygens theory
and if photons are particles, they can pass throgh some solid substances cant they?
and what exactly is a quantum?
i want a precise explanation bcoz i dont very much understand it is said that quanta r ''packets of energy''
packets? what exactly, in scientific terms r ''packets?''
does light have a mass or not?
when photons have mass...then.....?
and in a diagram in physics that shows a photon liberated, is shown as wave and not as a particle....




thank u

2007-02-22 21:24:27 · 7 answers · asked by Deranged Soul.. 2

Is it bigger or smaller than the 1st Ionization Energy of Hydrogen?

2007-02-22 21:17:43 · 5 answers · asked by jspiar 1

On a flat constant surface how much energy would it take one person to push a car from stationary to 5mph compared to the amount of energy required to keep it at 5mph?

I don't know if there is a relationship between these two values but I am hoping that if it takes 1 unit it of energy to keep the car moving then it would take 3 units of energy to get it moving (or something like that).

2007-02-22 21:11:41 · 6 answers · asked by Anonymous