Impact Definition and 992 Threads

whats the role of advanced math in a ordinary person' life directly? does it make a big change in ur life wether u know advanced math or not?

Let's do another one. The idea that humans can and have had a big impact on climate is increasingly thriving. Apparently we are the central factor -Anthropocentrism. It started with Ruddiman who had produced a http://courses.eas.uAlberta.ca/eas457/Ruddiman2003.pdf . How come, well the...

This is probably the third time that I have heard or read conflicting reports on this. http://www.rutlandherald.com/apps/pbcs.dll/article?AID=/20060104/NEWS/601040303/1039 http://www.Earth'sky.org/shows/astrophysics_interviews.php?id=49241

Hi guys; Got a question that has me scratching my head. The new server at my favourite hangout is a commercial pilot taking a wee bit of a rest break. The other day she told me that for some reason, the right side of a Piper Navaho always receives the vast majority of the damage in a crash...

How much would a DNA screen reveal about someone's personality and intelligence? :confused:

I read the book and looked through some sites but I don't seem to understand. I have a lab soon and I have to answer this question. What must be responsible for the pattern of tides that you see? Why? a. The moon orbits the Earth once each day. b. the Earth spins on its own axis once each...

My problem is as follow! A 45kg dog that is leached, starts to run and the line is all out when he have reach the speed of 20 m/s. The owner will experience a tweak. How do you approximate, this tweak? My thinking is that it depend on how fast the deceleration are, according to this...

hi, thank you for helping For same momentum change if we increase the time of impact by factor ten then force is smaller by factor ten. But why is that? I mean why doesn't a moving object at point of impact give away all of its momentum at the instant it hits something,no matter if that...

A boy with a weight of 70 kg jumps down from a 3 meter high tree. His velocity on impact I have found to be 7,68 m/s and the impulse is 536,7kg*m/s. Now I need to find the average velocity during impact. What formula do I have to use?

How would you accurately estimate the force of a car crash? Say, a 2,500lb vehicle has an impact with a wall @ 30mph.. How would you accurately estimate the force in LBS, Is it possible?

What advance in physics do you feel has had the greatest impact on history? This is a question I have to answer for a research project. Currently my plan is to do John Bardeen and the transistor but I'd like to here some other ideas.

Hi Can someone edit my intro for my history essay? This is a very very very very...very important essay so please be as [productively] critical as possible. this is the prompt: "To what extent did "Yellow Journalism" influence the United States decision to declare war on Spain?" (this...

From a thread in engineering: My point is this: though the Earth accelerates the feather and the ball bearing equally, the feather and the ball bearing do not accelerate the earth equally. As a result, the time to impact for the ball bearing will be less than for the feather. For objects that...

if Planck's constant were smaller than it is, shouldn't quantum phenomena be more obvious than it is now?

Hi everyone. I'm not a physicist but I need some help. In the hypothetical situation of a 1 kg block of concrete being dropped onto a concrete slab from 3 metres, the force of the impact is easy to calculate. However, if one were to pick up the pieces and re-drop them, what would be the force...

What are some scientific ideas you think had the greatest impact on society? It'd be nice to have a few that aren't "obvious." (don't mention the transistor :-p)

the universe is expanding. The space between particles of an object is also expanding. So will the force of expanding eventually break the attractive force between particles? stupid question.. help me please anyway thanks

So, I searched and found one almost identical to this, but no direction towards solution was posted, and I couldn't make sense of the formula in the original post. So... A red train traveling at 72km/h and a green train traveling at 144km/h are headed toward one another along a straight level...

How does ST vary with temerature? Is there a mathematical relationship? Also, does the sound water make on splashing have anything to do with its ST?Like,hot water makes a different sound from cold water etc.

Last year I completed two courses in the space of one, so this year I may have the possibility of having a free period. I was just wondering if having a free period looks bad to universities even if I have all my credits.

A paper just came out this month that makes it more certain that the Cosmic Microwave map will have to be revised, with even less quadrupole and octopole power. http://www.arxiv.org/abs/astro-ph/0508047/ On the large-angle anomalies of the microwave sky I opened a thread on this paper in...

What do you think about this term?

1. In general relativity, why is there a requirement for spacetime, in the context of the Universe, to expand/contract? It is often said that the theory predicts the Universe to expand, but Einstein missed out on this by adding the 'cosmilogical constant'. But where in the theory is the...

If I decrease vf, will I deliver greater impulse?

does anyone know the reason why they used a copper "impactor" for the deep impact mission? is it for its corrosion resistance? thanks

Reminder about "Deep Impact" on night of July 3 http://science.nasa.gov/headlines/y2005/images/deepimpact/skymap_north.gif here is a skymap NASA will send this 820 pound copper slug into the guts of comet Tempel 1 at 11 PM Pacific Daylight Time on 3 July For people with home...

This is a simple(?) problem but my ability to perform basic calculus disappeared long ago. I am working thru the equations for a spring response to a dropped weight. My primary reference is Shigley (for just about everything!) and I've validated the eqn's for deflection and max force. However...

a compressed spring is completely dissolved in acid what will happen to the elastic potential energy of the spring? With reasons. I think that the E.P.E will have an effect on the heat released but I still don't have backup. I am still not so advanced.

Could someone please help with this rudimentry calculation. I need to know the difference in the energy at impact between the following two scenarios. 1) 2 lbs falling under gravity from 8 feet with an impact area of 12 mm. 2) 4 lbs falling under gravity from 4 feet with an impact area of...

Is the struggle to reach beyond relativity and quantum mechanics, beyond the big bang, possibly its creation and necessity to our logic, the result of structural problems with mathematics itself? The fundamental unit of maths is numbers, is it not? The discovery of zero or its inclusion in the...

In this problem, you will estimate the cross section for an earth-asteroid collision. In all that follows, assume that the Earth is fixed in space and that the radius of the asteroid is much less than the radius R of the earth. The mass of the Earth is M_e, and the mass of the asteroid is m. Use...

On a frictionless table, a glob of clay of mass 0.740 kg strikes a bar of mass 1.740 kg perpendicularly at a point 0.140 m from the center of the bar and sticks to it. If the bar is 0.660 m long and the clay is moving at 9.600 m/s before the impact, what is the final speed of the center of mass...

Is the spin of an atom come from (or based on) the Nucleus (i.e. net of Neutrons and Protons)? With the spin of the Electrons not really noticed or counted though a sense of being ‘lost’ or masked by being in an orbital?

I wonder how could I calculate impact force of an object (eg. a stone) in a free fall impacting on the perfectly inelastic (perfectly hard) floor. I know: - m -mass of the falling object - h -height of the fall - v -speed at the time of impact - t -time it...

I live in Northern Ireland, and we have many different groups of people that all listen to different / mixed types of songs. I have observed for quite some time now (Years) that certain people that listen to certain music behave in certain ways. The biggest impact music has had in Northern...

Hello, could someone please help me out with the following question. Q. A person suggests that if you are in lift, which is falling due to the connection cable having previously snapped, you can avoid injury by jumping up just prior to the lift's impact with the ground. Comment on the...

Hi all, I've been doing a lot of research recently, but am still struggling to do a good hypothesis for my experiment. The experiment is to find the efficiency of a ramp. I will be changing the height of the ramp and will be measuring the force required to lift a bucket with a total mass...

In the Rutherford scattering experiment a very thin gold foil target is bombarded with a beam of a particles of known kinetic energy. A detector which can be moved on a circle around the target counts the scattered particles. What was the impact parameter of a 4.57 MeV a particle if it was...

During most of the 19th Century physicists believed that atoms were the smallest particles of matter and thus couldn’t be further subdivided. With such characteristics, an atom of one element obviously couldn’t become an atom of another element – a process they labeled “alchemy”. J. J...

Hey.. i was wondering how math ( especially algebra ) could be used in gathering information about it that could help in its prevention? what are the formulae, if any, that can be used to find the distance/height, impact ,etc of the tsunami? thanks

Ok, we were doing a lab yesterday in physics class, and we had to find the velocity of a bullet hitting a block with a hole in it's center, and is hung... when the bullet hit the block, it made a 18 degree angle... my teacher gave us a formula for finding the velocity of the block and we got the...

a wooden peg is hit vertically by a mallet which is also moving vertically. The mass of the peck is 0.4kg and the mallet is 2kg. The speed at which the peg starts to move into the ground is 6.67m/s. Given that the ground opposes the motion of the peck with a force of 1kN, find how far the peg is...

So is it going to happen? what will be the consequences if it does happen, will we suffer a multi pole magnetic field for hundreds of years? some say that cancer will increase at the multi poles and that thousands of people will die as a result, so who cares about global warming if a new...

I want to take a look at the history of philosophy. I would say it's a look at the history of "philosophy of mind", but it covers more than that. I want to look at the points throughout history where a shift was made, to the using of terms and concepts that had never been used before. I want...

If someday we discover how to mine metals from the core, will it have any effect on the magnetic field or the climate of the Earth due to reduction of heat in the core as the metal mined will be hot and will slowly drain the heat of the core.

Reference: http://www.harktheherald.com/modules.php?op=modload&name=News&file=article&sid=45033&mode=thread&order=0&thold=0

Launched today at 1:47 pm. Impactor will hit comet Tempel 1 on July 4. Love the real-time blog for the launch... http://www.space.com/missionlaunches/delta2_launch_050112.html

Deep Impact Mission Sounds Scary? I don't like this misson. There are better ways to study this thing. Land on it and do the probing! Just what we need to do. Blow this thing to bits so it can rain down on us,possibly.It ain't worth the chance. "The impact spacecraft will fly head-on into...

The Impact Point Song *** If Archimedes look around To find Newton underground He would use his "c" class lever To teach Newton the manners of clever *** Newton, Newton, you naughty one What the hell you think you've done? You distorted the balance you woke our GOD Your punishment is...

I need some help from the experts, because I am really having trouble simulating this in the real world which is where I can understand things. If propane gas was released from a container (typical metal propane tank or cylinder) where it had been stored as a liquid under pressure, it would...