Effects Definition and 963 Threads

Turning effects of forces 3 Homework Statement A ruler of an unknown mass is 52.0cm long. To find out its mass, you put a stone of 100g on the ruler 3.0cm from its end and balance the ruler on a sharp edge. The ruler is balanced when the supporting edge is 15.0cm from its end. Calculate the...

Homework Statement A ruler of 0.75N and 52.0cm is supported 1.0cm from each of its two ends. A weight of 1.00N is placed 16.0cm from the left end of the ruler. Determine the forces acting upon the ruler at the two supports. Homework Equations I know that the two forces of the supports...

Homework Statement A 20g rubber is lying on the end of a 30cm long 30g ruler. Determine how far from the rubber you have to support the ruler with your finger to keep the system balanced. Homework Equations I know that I have to calculate the forces which act downwards: the rubber...

Homework Statement A uniform, horizontal 300N beam, 5.00m long, is attached to a wall by a hinge. Its far end is supported by a cable that makes an angle of 53.0° with the horizontal. A 600N person stands 1.50m from the wall. Find the tension in the cable (force). Homework Equations What...

hypothetical: If I were to spin with my arms outstretched, with the tips of my fingers moving at (or near) the speed of light the center of my head would therefore not be moving at all. Would the centre of me age faster than the extremeties?

In many fantasy books and movies, like Harry Potter for example, there are wizards or priest who perform "fire magic" by throwing various powders into a fire cauldron. The effect is a poof of smoke or a flash. I guess the intent is to evoke some spirit or something. My question is what agents...

In this example I make 2 assumptions 1. if an object is moving through space at time T0 it will be at point x,y,z,T0 and at a different time T1 it will be at a different position x,y,z,T1. The other assumption I make is that light is non ballistic. see the associated pics Referring...

1. The problem statement, all given/known data A bar magnet is positioned at the mouth of a solenoid. The current indicated in the solenoid is then turned on. (Assume the solenoid is a lot bigger than the bar magnet.) Gravity and friction can be ignored. Describe what would happen, and...

Homework Statement If we put a compasd UNDER a cable.. Will that effect on the compass ? I WANT THE ANSWER AS SOON AS POSSIBLE Homework Equations The Attempt at a Solution

Homework Statement Suppose the reaction system UO2(s) +4HF(g) <-> UF4(g) +2H2O(l) is sealed in a container and allowed to equilibrate at a particular temperature. Explain what happens to the nature of each substance if you: a. remove some UO2 from the system b. remove all UO2 from the...

Impact of electric shock on human body is above all with electric current, not with electric power. The dead limit is somewhere 100 mA. Why current and not power? The main effect of electric shock are on heart and thermal efect. Obviously, thermal efect is by electric power, so it is not the...

This is a bit of a dumb question, so I apologise for the bluntness, but I was wondering. Can we see our own Milky Way out there in space due to gravitational effects? I understand that gravity allows us to view single galaxies in duplicate positions across the sky, it made me question whether...

I've nothing more than one high school class and a curiosity in physics, and I'm sure this is a simple, albient random question. Its something I was discussing with some friends the other day, and I'd like some legitimate input, instead of our uninformed guessing. Thanks to all who read and...

I'm writing a book and I have a question about the effects of a fast moving object on an air mass. Strictly speaking, I am wondering how to compute the effects of a human-sized (70 kilo, roughly,) object moving in excess of 30,000 miles an hour on a hypothetical mass. I'm recently out of college...

I'd like to expand on the example Dweirdo set in his thread and ask a few different questions. I didn't want to hijack his thread as I thought it would keep info more organised if I separated the discussion. So, let's take the example that we have a black hole and two observers, one (A) far...

1. Apply a magnetic field B to a hydrogen like atom. This gives rise to an additional potential energy term of mu_b*B*L_z/hbar a) Show that the eigenfunction PSI_nlm is still an eigenfunction in the presence of the magnetic field b) Show that the eigenvalues are E_n + m*mu_b*B How do...

Hi Guys, :rolleyes: What will be the effect on 'Power Factor' of the power supply system under the following conditions:- 1) If I were to connect several inductors in ‘parallel’ with the power supply system. 2) If I were to connect several inductors in ‘series’ with the power supply...

Hello all! I am building an effects pedal for my guitar (dont have a choice, I spent all the money I was saving on the guitar). Since electronic components are cheap, for once, I am glad I am studying EE. At first I thought I'd design the circuits myself, but after doing a bit of research, I...

I have a stochastic dynamic program with markov process written in FORTRAN, below. If you comment out the write statement that says "uh, THIS SHOULD MAKE NO DIFFERENCE" and/or some of the other write statements that are just text, no variables being written, you will see a difference in the...

Homework Statement So we did an experiment where we put a leaf section in KCl and another leaf section in NaCl. There was a marked difference in the percent of stomata that opening between the two. We let the two sections sit in solution for 60 mins each. The leaves in KCl had almost...

Fifty years ago (m/l), Bob Dicke and Carl Brans developed a S+T gravity model. Concurrently, Dicke had a project to look for a small solar oblateness. He wanted the precession of Mercury caused by the scaler part of gravity to be offset by the opposite precession caused by oblateness...

Hello everybody I have a question about light (a laser) and speed. Let's assume a object (space probe) traveling in a constant motion that haze a vacuum inside itself. Now there are 4 lasers groped in pairs of 2 in south a way that both lasers in a group are connected with both their ends...

In my biology class, I've learned that most of the fundamental processes of genetics occur on an atomic level (i.e. DNA, RNA, etc.). Can quantum mechanics be applied?

1. Hi, I've got this question that's asking for the effects of increasing the size of the liquid -in-glass bulb. I think they're asking for at least 3 points. 3. L think its supposed to accentuate the increase in volume of the liquid, and it increases the time taken to measure the temperature...

Homework Statement Two charged pellets are pulled apart to twice their original separation. (a) Which is likely to be larger, the gravitational force or the electrical force between them? Why? (b) Which will change by a greater factor when they are pulled apart, the gravitational force or the...

Homework Statement In the figure, a point charge -3.2μ C is a distance d/2 directly above the center of a square of side d = 0.34 cm . What is the magnitude of the electric flux through the square? (Hint: Think of the square as on face of a cube with edge d.) (in N*m^2/C) Homework...

I have come unstuck in my coursework project, and cannot find any information/equations for the effects of shielding on wind loading in a structure (This is not an ordinary structure, it is an unsymmetrical sculpture made up of circular and Universal beams). So i would firstly like to find how...

Homework Statement A star of mass M and radius r rotates with angular speed of such value that objects on the surface at its equator are just about to experience zero apparent weight. The period of rotation of the star is given by? Homework Equations g' = g- Rw[SUB]2 (where w is the...

My question is to what extent the specifically non-linear properties of GR have been analyzed by theoretical physicists. Can they give rise to chaos and complexity, as many non-linear systems do? I also wonder: I've so far mostly read about linearized descriptions of gravitational waves...

Calculating effects of air resistance on a ball of mass 0.67kg, being dropped from a height of 4.93m. I have worked out theoretically what time it would take without air resistance using s=ut + 0.5at(squared) however i cannot find an equation that will factor in air resistance. thanks

The woman I love has been diagnosed with Ovarian Cancer; so any info, or personal experiences shared here would be much appreciated. Of course she has a doctor to tell her what to expect. But it just so happens to be a very touchy subject with her; and getting any feedback on any matter at...

Hi all, I'd like to know what happens when we consider relativistic effects in generating a pseudopotential? Any refrence recommandation is welcome. regards, Hana

Homework Statement Two of the MHD equations can be formulated as \vec{E} + \vec{v} \times \vec{B} = \eta \vec{J} \nabla \times \vec{B} = \mu_0 \vec{J} where [itex]\eta[/tex] is the resistivity of the plasma. a.) Derive an equation for the magnetic field at very high resistivity and...

Hi I'm an MPhys Physics with Astro student, conducting my final year project in the field of radio astronomy (well, it's more like electronics at the moment - trying to fix a downconverter, but anyway...) My question: I'm interested in observing the 6.67GHz methanol maser emission. For a...

How and why does quantum leap occur? And (please do not mind my 'confusion') how can an electron "absorb" a photon? If in this singularity, all photons were prematurly absorbed and ,in response, release, how are photons created. Before, i thought electrons jumped levels due to other quantized...

It is my understanding that the Equivalence Principle postulates that if I were standing in a closed room, I would not be able to distinguish whether the downward force that I felt was caused by (1) the presence of a massive body such as the Earth exerting a downward gravitational force or (2)...

Hi I know that our world is quite unstable and minor changes in these parameters could make the existence of life impossible. However, I am interested in what exactly is going to happen if we start to increase/decrease any of 30 parameters. It is interesting how well-tuned these parameters...

Homework Statement If you increase the temperature of an ideal gas, then a. the average distance a molecule travels between collisions must increase b. the pressure must increase c. the speed of its molecules must increase d. the average time between collisions of its molecule must...

Can anyone explain why a CT would be subject to flux saturation, but a VT normally wouldn't?

Hi there, This is my first post and I am guessing I should post my question here at the astrophysics section so I'm doing so (admin, if you think the topic should belong somewhere else, please move it). My question is with regards to the continued research conducted by Tajmar et al...

In a nearby thread: I believe it was correctly concluded "yes" because an electromagnetic (EM) field has energy and pressure so it curves spacetime; it does have a gravitational effect. Although it was not discussed, this effect is much, much smaller than the electromagnetic effects because...

astronaut traveling.. what effects would she feel?? Homework Statement An astronaut is traveling in a rocket in outer space in a straight line at a constant speed of 0.5c. Which of the following effects would she experience? Her heart rate would change. She would feel heavier. She would...

Hello, I'm a bit confused here about this topic. I can't seem to find a proper book on it so reading loads of papers of try and get a grip on it. I had come to the understanding that the high tensile and yeild strength developed here was due to the subgrain/micrograin size and the partial...

Is it possible to simulate capillary effects in a channel using femlab (exclude the newest version)? I mean the new version has wetted wall boundary condition setting, which can set the wall adhesion and the contact angle between the air/liquid interface and the wall. But the older version...

Hypothetical thought experiment; What would happen if you created a very long cylindrical material, eg 100 000km long and took it into deep space. Here you rotate one side of it so the tube is spinning in a large circle with radius 100 000km, ignoring friction and gravity. Once it is...

Hi, I am currently doing a scientific research regarding epoxy adhesive. Basically, you shine UV light onto the adhesive, it hardens. Im given certain parameters like, intensity of UV light and duration of exposure. I am supposed to investigate effects of varying parameters on...

Could someone PLEASE explain in simple language "procedures whereby scientists modify the germ plasm of plants and animals by the use of X rays?" And, how might that effect chromosomes? If you do not know, please advise where I can find this information. I am not a student and this is related...

I recently got this as an idea for an interesting independent project. I had planned to do the experiment using the four point method of resistance measurement, but I'm stuck on figuring out just what materials I might need to use. I intend to use the basic high school equipment, nothing too...

I would be glad if someone compiled a list or atleast provide the link for the actions of various oxidizing and reducing agents like LAH, BAH, hydrogen, potassium permanganate etc. and on the various functional groups. This will be very useful to any organic aficionado and I will be very happy...

i need to learn c/c++ to add effect on 3d objects and to use agia physix engine (like adding gravity , refraction,...etc) and i don't know where to start and what to read and what to learn there is so much books and so much programs and lectures (i don't mean the 101 books i mean after that)...