Cause Definition and 572 Threads

I often here claims that higher dimensions such as the 5th and 6th dimensions deal with different possible realities, be it branching off or from different start conditions. I find this confusing and would like to have it cleared up how it is possible for different so called realities to occur...

Have been reading about cepheid. Can I just check I've got this? 'When at their hottest (when gravity has squashed them) have more doubly ionised He so star becomes more opaque' Now was just wondering what the main mechanism is here? Because He2+ doesn't have any electrons left to absorb photons...

Basically I'm not sure how the interaction between the circular magnetic field produced by the current in the wire and the magnetic field of the permanent magnet interact to cause the wire to move in circular motion. If someone could explain that I would appreciate it.

People generally associate Gastroesophageal reflux disease (GERD) with excessive production of hydrochloric acid in the stomach. We know that HCL is essential for proper digestion. In acid reflux the acid comes up the esophagus from the stomach due to the insufficiency of esophageal sphincter...

hey guys, what is the cause of mass? in my understanding the elementary particles directly derive their mass from the higgs-field, and protons and neutrons get their mass from the (potential?) energy in between the up and down particles chained up within the protons and neutrons. my question...

I put a tumble dryer that had been used only a few times back in operation after a decade being completely out of service. Heating failed shortly after switching on. Checked the heating element and noticed that it is broken at a dozen locations. The spiral is very brittle and breaks easily when...

I’ve heard that the black holes that merged together and were the source that triggered gravity wave detector, have lost three solar masses. I understand to a very limited degree the basic notion of energy conversion like is the case in nuclear fusion/fission, annihilation, chemical energy...

I've a problem with a question regarding a closed spherical storage tank of 30m^3. Its filled to the 99% mark with Nitric acid and the tank is made of stainless steel. I'm trying to determine the temperature rise that will cause the liquid to completely fill the vessel. I know that as the...

When a voltage gradient across a dielectric becomes too large, the material will break down and become conductive, mostly because of plasma ionization. Thus we get lighning, static electricity fingertip shocks, and tesla coil shows. But often during such breakdowns, there are multiple...

A little complicated and interesting story, I will get down to the point: I need a number of substances that cause skin rashes/skin redness or overall has a bad reaction to human skin. This is all for research purposes for natural skin products me and a group of friends are developing.

If a ship could cancel out the effect of gravity, wouldn't it be able to pass through the event horizon of a black hole, and take a tour of the singularity, and then just report back with its observations? Also, if a ship had the capability to cancel out the effect of gravity, wouldn't this...

This thing has been bugging me lately that can the constant mass density phenomenon of the universe may not be due to inflation? Can it be considered a consequence of the Casimir effect on the ( Supposed) boundaries of the universe?

In plants , Spores are produced ( asexual reproduction) as a result of meiosis , so there should be genetic variations as meiosis causes genetic variations! please help to clarify the concept

my teacher said it is the intermolecular forces between the particle but i don't agree with them so anyone can help me .

how does pressure on a submerged body in water experience an upward thrust ,when the cause of pressure is gravity, which can only be downwards

Can you pump enough low energy photons into a box that the rate of dissipation is overwhelmed and cause the box to explode?

So, one of my friends posed this question to me, with some background on vibrations on the Higgs Field, But, he also said that doesn't explain why matter causes inertia. As, if that accepted theory is true, it should simply create big, choppy waves. I apologize if my writing is confusing, and I...

Hi all, I am currently reading 'The Science of Interstellar' by Kip Thorne. Kip says that cooper could navigate around the Gagantua system using Gravitational Slingshots with Intermediate-Mass-Black-Holes. However these interactions would accelerate/decelerate the ranger by up to 22% of the...

This is not strictly a physics question, I just figured this is the best place to ask it. I think everyone is familiar with the subtle difference in the effects of gravity from the poles to the equator. At or near the equator, objects weigh about 0.5% less than they do at or near the poles. My...

Physics Videos by Eugene Khutoryansky (a widely respected channel) recently posted a video on YouTube suggesting this. I know that gravitational fields cause time dilation (with time passing more slowly the closer an object is to the centre of gravity, relative to more distant observers), but...

Homework Statement imgur link: http://i.imgur.com/0Zc8nQe.png Homework Equations Y-Delta transformations The Attempt at a Solution Since it's a proof, I can't check the answer in the back. What I did: I transformed the three impedances in their delta config to a Y config, and my TI89...

I read this statement from Lenard Audio. "When a large signal spike is created by un-plugging or plugging in signal leads, or when a pre-amp valve is driven hard into distortion (guitar amps), a large non-symmetrical square wave may cause a temporary DC Voltage to appear across a coupling...

Homework Statement An infinitely long line of current $I_1=6[A]$ is following along the positive z-axis in the direction of +$\hat{a_z}$. Another current is following a triangular loop counter clockwise from the points A(0,2,2), B(0,6,2) and C(0,6,6). Homework Equations To start I applied...

I'm trying to understand the concept of work. I understand that no work can be done by a force if there is no displacement, but I have got confused about whether a force has to cause the displacement. The site physicsclassroom.com says this: But a mentor on this site says this: This...

Does a 'weak measurement' on the spin of an electron in a pure state put the electron in a mixed state of the previous state and the state of the measurement axis of the measurement?

can power supplies cause temperature fluctuations in a circuit? Or, instead, are they sensitive to temperature fluctuations in the environment, which can cause temperature fluctuations in a circuit?

Hi. I am a 13 years old and interested in particle science. I was reading on tachyons and how you could hypothetically send them as signals back in time (not that I'm saying we will manage anytime soon or ever). It got me think about it and I realized something. I'm sure somebody has heard about...

According to current theory, high concentrations of matter warp space-time and create gravity. The Einstein field equations EFE describe the fundamental interaction of gravitation as a result of spacetime being curved by matter and energy. Would not a reinterpretation of the EFE lead to the...

I find difficulties in identify the forces acting behind the acceleration of objects that are considered consequence of conservation principles (for istance of KE and angular momentum). I'll make an example to explain. The same string-mass system is linked to a rod. In case (a) a force pull the...

I know that most friction is caused from rough uneven surfaces rubbing each other, but what is the cause of friction between 2 flat surfaces?

Hi Everyone. This thread relates to the ongoing debate as to whether or not time has a beginning and other related debates. As I see it, a beginning of time would imply the past existence of a very first cause which was not the effect of a previous cause. Who agrees and who disagrees with this...

suppose a platform "P" is rotating about the z-axis wrt x-axis . another platform "Q" rotating about z-axis below "P" with same angular velocity wrt x-axis standing on Q , P is at rest wrt Q, After some time rotational inertia of P about z-axis starts changing with time standing on Q , P will...

I'm trying to understand why the speed of light is the same for all observers. I have found different answers on-line. This page claims that it relates to time dilation. But consider the following thought experiment: two ships flying at 98% c. Ship A is moving toward the sun, and ship B is...

Hello, I've been doing some research on gravitational waves since their discovery, and I found that all of the places I looked were missing an important piece of information, that is: What is the mechanism by which angular momentum is being conserved. All of places that I've searched will...

If the Earth was really massive, then is it possible that no sunlight will reach Earth due to gravitational lensing?

One reads of cancer ever more these days, it seems like one can get cancer of anything, surly there must be a different switch to switch on breast cancer or prostate cancer.

I read here: http://static.schneider-electric.us/docs/Motor%20Control/AC%20Drives/8803PD9402.pdf that harmonics cause stray flux losses in transformers, how is this so? Thanks

Homework Statement Which of the following foods is more possible to cause allergy apples stawberries cereals almonds Homework EquationsThe Attempt at a Solution I'm between almonds and strawberries

If I understand correctly, quantum effects become very small as the object in consideration becomes larger. My question: what causes this? For instance: does it have to do with the relation between the quantum objects in the macro object, or does the math show that quantum effects become...

Does a large amount of mass in a 'small' area cause spacetime to bend inwards to the centre of mass? If so: Since the path of light changes because it is traveling with the bent spacetime, why wouldn't other moving particles also bend their path while moving in a bent spacetime? So if it is...

I'd like to begin this by simply stating that I am a complete layman when it comes to ANY of this (I'm just a regular 15 year old high school kid). Recently there has been some fearmongering in a certain game that I play about how this type of clicking causes carpal tunnel syndrome. I am...

I'm still working on understanding some of the subtleties of the lunar orbit. We know that the lunar nodes ( where the lunar orbit crosses the plane of the ecliptic ( a cryptic term for the plane of the Earth's orbit.)) shift progressively and complete a cycle in 18.61 years: the period of...

Is it possible that the increased acceleration of the universe could be caused by the cancellation of gravity waves? If not, what would be the impact on space-time when gravity waves do cancel out?

Over the last year or so I've been doing quite a bit of reading trying to find out what is actually causing lunar nodal precession. There seems to be a lot of handwaving but no definitive answer, which I find rather odd. Maybe I've just not found the right source. Google seems obsessed with...

Could accreting material on a neutron star’s poles impact with enough energy to initiate fusion reactions, some of which escapes the star as ultra-relativistic jets?

Please be patient with my ignorance. :) I have just learned in the LHC's own website ( http://lhc-machine-outreach.web.cern.ch/lhc-machine-outreach/beam.htm ) that their proton beams traveling at 0.999999991c carry about 362 MJ of energy, equivalent to 77.4 kg of TNT. These beams seem to be...

Homework Statement I've uploaded an image of the problem below. The problem states: Determine the value of P which will cause the homogeneous cylinder to begin to roll up out of its rectangular recess.The mass of the cylinder is m, the mass of the cart is M. Friction of the cart wheels i...

Homework Statement We have: I=nAve Imagine a copper wire with a constant current through it: I=constant e=constant n (for copper)=constant Hence, we obtain: A is inversely proportional to electron drift velocity. My question is: how does that make sense? Why would the cross sectional area...

Hello everyone, How does this occur. I'm talking about retention (eg urine stuck in bladder) not the pre renal failure which myocardial infarction can obviously cause. Also while we are at it, I also read diuretics can cause retention of urine also. That's interesting because that defeats...

during my reading of ender's game, there was a device that could split molecules and cause a chain reaction of destruction. this seems possible yet impossible to me. can such a weapon be created and if so what causes the reaction to be so destructive.