Classical Physics

It's 3 am in the morning and i'm asking myself: if we were to put a wood plank into an ipotetic electric oven that could reach infinite C°, would the wood catch fire or melt into a blob of atoms?

What does "truncation of a taylor expansion" mean? Are someone here familiar with what an aperture is defined as in geophysics?

Hey guys, What does a phase shift of sqrt(i)=45 degrees mean? The context is that it describes distortions made by a phase of sqrt(i) = 45 degrees. I did not understand this sentence, because I did not understand the sqrt(i) =45 degrees. Hope someone can help😇

My wife tells me that the rechargables on our phone take longer to recharge, (she thinks). Is it possible to tell if their life is coming to an end please? I just have a multimeter and some basic components. Regards

What does "air is saturated with water" or "air is saturated with something" and how can I relate this to vapor pressure?

I'm bad at math. I would like to ask how to express the change in velocity of an electron in an increasing electric field with constant magnetic field (separate magnet, I need electron path not force on the system) I learned from reading about magnetrons that the radius of the curved path of an electron in an electric field with perpendicular magnetic field is expressed R=(mv/qB) Is the change in radius due to the change in velocity expressed dR=(mdv/qB)? How do I express a change in velocity of an electron in an increasing electric field? -DT

Hi everyone! I am currently getting myself started in Physics. But for some reason I can't understand what vectors and scalers actually are.

Hello, What is a point diffractor? Thanks😃

This is a question about variables having to do with force on a current. I need correction in my understanding, I don't get the difference when a current is in a wire vs not. I have drawn out a scenario, the contraption I drew consists of 5 parts. The positive wire (red), it's insolation with exposure at one end (black), the connecting structure (green), the negative pole(blue), and a power source (inside green). In this scenario, the positive wire's exposed end is 1mm from the closest end of the negative blue wire. The electric field applied is over 3kv to exploit thermionic emission, and induce a spark. If the current was to increase during thermio…

Hope this is the correct discussion to post this, I simply cannot get my head around the basic theory surrounding Atomic Radiation. I have been working near an old Nuclear Power Station in Wales, its manily de-commissioned now but radioactive waste is still insitu, and the Station will not be totally safe until 2083 apparently. MY difficulty is actually understanding how that waste , wether it be spent fuel or simple pipe fittings from the reactor buidling remains so powerfully iradiated for so long. Where did such radiactive material come from in the first place.

(continued from previous thread) I'm starting to make some progress with the mathematics. At least I finally think I figured out what "p" in pV=nRT means in terms I can understand. Please correct me if I'm wrong. p is absolute pressure. The scale of absolute pressure begins at a total vacuum. This is very different from what I had supposed earlier. Putting this in units that are more familiar I came up with this table: (figures are rounded out) 1 psi = 6895 p (absolute) = .06 atm = .0689 bar 5 psi = 34475 p = .34 atm = .34 bar 10 psi = 68950 p = .68 atm = .69 bar 14.7 psi = 101317 p = 1 atm = 1.01 bar 15 psi = 103425 p = 1.02 atm = 1.03 bar …

What is the physical meaning of enthalpy?

A variation of enthalpy at constant pressure is numerically equal to the variation of heat in a chemical reaction, but what is enthalpy in itself? what is its difference for internal energy, is it calculated as H = U + PV, or does that mean physically?

If gravity is a distortion in space time, why are we drawn to the planets interior instead of the direction of the distortion? I think understand the concept of the conical distortion pictures, but im still having trouble understanding why. Does the rotational speed of the celestial body causing the distortion play a part? This may have been touched on before so if you could direct me there that would be awesome.

How is Le Chatelier's Principle Accommodated in Statistical Thermodynamics?

What functional relation is there, if any, to Unruh radiation emitted under high velocities by an accelerated spaceship, and of stationary thrusters, either the Woodward device, which accelerates a phononic shock wave, or the Shawyer device which accelerates microwave standing waves in a sealed cavity? Here I am presuming that the NASA work showing the Shawyer device to work as legitimate, hence my interest in this area.

Let us say you have a tote full of water and you connect an air pump to draw the water using negative pressure generated by the pump and you used a very flexible hose connected to the side of the tote. Would there be an opposite force on the tote moving away from the pump and perhaps even create tension on the flex hose? Let us say you have a cup full of air and you use a vacuum to remove the air from the cup, would there be an opposite force on the bottom of the cup? When wind starts to blow on the back of your head and you feel the wind, why can't you feel the wind push off your face as the air in front of you starts to move away from you?

If one were to have an inertial thruster, would that also constitute a gravitational wave transmitter of sorts? Even though it may function on simple conscepts on the macro scale, aren't all gravitaional effects based upon the same fundamental laws near or at the plank scale, and if the thruster causes a synthetic gravitational vectorized force, does that remove it from such considerations, and onto something else? How would a thruster behave if impinged upon by a gravity wave crossing it's thrust vector at various angles? Could GW signals be detected by causing distortions within a thruster set at a fixed pattern and an incoming wave might distort the scope trace? Would…

Am I to understand that entropy is introduced as part of the first law of thermodynamics. And the properties of entropy are determined without a second law. And the second law establishes the condition for the growth of entropy. In other words. Is it possible to say that entropy is introduced as a convenient parameter for determining the inversion of the heat transfer sign, for example?

Can someone please help? This isn't homework, its just a quick question. Does anyone know the solution to a projectile motion problem in which the variables launch angle and horizontal travel are given? And also theres a catch, the projectile is thrown from a height and lands at a different height. The initial variables for a problem like this are, 1. Launch angle, 2. Horizontal travel, 3. Launch height, 4. Impact height. The only solutions I found online were only for a projectile being thrown, and landing at the same height. Thanks in advance.

If an object can be made lighter by introduction of an purely electrical stimulus, does this signify that a thrust has been created within this object, or is there some other mechanism that can explain weight changes in a gravitational field, but not cause thrust in free space, if one were to rule out measurement errors?

With a typical comm satelite, what amount of thruster force is required to keep it in proper position? Thanks

The physics book I'm using gives two examples where one is a third law pair and the other is not. What is the reasoning that this example is not a third law pair: "The upward normal force from the table and the downward force due to gravity are not an action/reaction pair of Newton's third law."

I really hope this is the right place for this, and I'm very sorry if it isn't. The study of light has always come under the heading of "physics" when it's been taught to me, but I'm afraid science is my weakest area! I'm told aluminum foil is extremely light-resistant. Can anyone tell me what other materials/substances have light-resistant properties equal to or greater than aluminum foil? I'd be tremendously grateful for any help. Thank you very much for your time. The thing is, I have B12 injections, and the glass vials of B12 I use are extremely vulnerable to light, so the supplier suggests aluminum foil be used to wrap around the vials at all ti…

if i set up a wire loop J with a current I flowing clockwise, and attach wires AB, BC, CD & DG as seen in the picture the current on wires AB, BC, CD & DG i would expect to be 0.5I while the portion of loop J (portion AC and CG of wire loop J)adjacent to wires AB, BC, CD & DG also carries 0.5I my question: are the forces between the current in each wire and current loop J attractive to each other? and are the forces between the currents in the wires repulsive or attractive?