Classical Physics

Can anyone tell me if such a setup will give the results I assume: DIAGRAM: https://i.imgur.com/s8RhE8S.jpg Assuming 1) the scanner can angle a beam anywhere on the circular off-axis mirror and 2) the off-axis mirror can be rotated as an the diagram to any angle needed, can the beam shooting at any point on it from the scanner be made parallel to the middle beam bounced off of the off-axis mirror?

Hey everyone, Not sure if this is the right forum to ask this in (and I might post this same one in one of the biological sciences’ forums as well), but I had a quick question for anyone who has a solid understanding of how bats respond to photographs (and light)—and vice versa (the behavior of light as it captures a photograph of a bat): When taking a picture of a bat you happened to have found, is it normal to have disruption in the photo’s light-frequency, so much so that there are areas of dark bars in the photo? In the photo with the dark bars, the camera lens was within a foot of the bat. I’m wondering, do bats emit on the molecular level some kind of…

Good morning. I am trying to understand this so could a kind someone show me a simple circuit where I could use say a 1.5 and a 9 volt battery to explain the principle of high and low voltage against big and little amps. Not to tecky please, I have a multimeter, some leds, resistors and a few other bits and pieces. Regards

Stable EMP field, not a pulse, that would protect a country from missile and EMP pulse attack. Does it exist?

It is commonly assumed that perpetuum mobile of the second kind or maxwell's demon suppose to violate the second law of thermodynamics. And the second law of thermodynamics claims that: "In every real process the sum of the entropies of all participant bodies is increased. In the idealized limiting case of a reversible process, the sum remains unchanged." (Wikipedia) However, does this "idealized limiting case", as they said, contradicts to nature's laws? If not, then doesn't it means that in theory perpetuum mobile of the second kind could be created? Let assume we have eternal non-dissipative oscillations in some system during which entropy increases in one par…

So pretty much, my science teacher spoke about that egg thing where there's two eggs, one hollow and one normal,and if you dropped them at the same time they will hit the floor at the same time. But i thought that the more the mass the more attraction it will have to other matter of higher mass (the earth). Sandbox talk: So if you perfectly dropped the two eggs at exactly the same time in a vacuum so there's no opposite force and it were attracted to a gravitational force equivalent to earth,with the surface being absolutely flat, the egg with the most mass will hit the ground first at a small scale compared to the other hollow egg. Its a stupid thing but i…

Reminding the Mach's principle that stated that: You are standing in a field looking at the stars. Your arms are resting freely at your side, and you see that the distant stars are not moving. Now start spinning. The stars are whirling around you and your arms are pulled away from your body. Why should your arms be pulled away when the stars are whirling? Why should they be dangling freely when the stars don't move? I have enhanced in bold the part I'd like to discuss. Imagine you are an astronaut lost in deep space And you want to spin, like a dancer executing a pirouette Without a floor, without a grip anywhere, can you execute a pirou…

if you teach you kids physics, what are the most important/basic 5 concepts you will tell them first.

Hi dear music lovers! The violin and all bowed instruments has an important non-linear behaviour. It is noticed when playing two notes simultaneously on one instrument: the nonlinearity produces an additional beat, absent if two instruments produce the notes separately. When the frequencies are far from a ratio of integers, for instance in an equal-tempered small third interval, the beat is unpleasantly fast and seems out of tune, so violonists must train to play equal-tempered. The equal-tempered octave, fourth and fifth in contrast are nearly ratios of integers, the beat can be unnoticeable for being slow; violonists use it to tune the instrument. No source of non-…

If yes, how can we store it? if Antimatter contact with "matter', there will be a blow-up, right?

im not a scientist or anything of the sort so il have to put this relatively simply, since gravity only effects things with mass and a black hole which has a massive amount of gravity can effect space and time, does space and time have mass? and therefore couldn't it be detectable with the right equipment?

Hi! My friends and I were having a heated debate yesterday. The question was whether when one squats is the downward force exerted on the legs (hips to feet) the same if the shoulders and arms help support the bar OR if the arms are just there to hold the bar in place? The arms holding the bar do not move they are just flexed and holding the bar off the shoulders. The distance the bar has to go down is equal to the distance the legs are going down in both problems. If there are any variables that i could have forgotten to say please add them, thanks!

So i'm trying to understand magnetic fields, and I thought the way this video explained it was really interesting. He explains that if you look at a magnetic field as a "solid" it helps make sense of it. Because in essence a magnetic field is a SOLID object, but it's invisible. There's no real energy there, only what you put into it. So if you push opposing magnets together, one magnet isn't "pushing" the other, you're actually pushing it with an invisible object.But, why then can a magnet literally "pull" another magnet to it? Especially if it's a solid.Hope I explained this question properly.

Hello, Does someone know how explain what physical feature (molecules arrangement, atoms size, etc) makes an object transparent for visible light ? Any good explanation is useful. Thanks.

Do you know where I can find a formula to calculate how long it would take to drain a cylinder under pressure to atmospheric pressure? if I know the volume of the cylinder and the size of the opening.

Let's begin this thread with an excercise. If you think, that you're good at calculating things, I have an interesting problem to solve. I would like you, to use the basic rules of General Relativity - Einstein's field equations, combined with interior and exterior Schwarzschild solutions - to describe the gravitational field as an embedding diagram. Here is the basic knowledge, regarding the given problem: https://en.wikipedia.org/wiki/Introduction_to_general_relativity#From_acceleration_to_geometry https://en.wikipedia.org/wiki/Interior_Schwarzschild_metric Here is an example, how to make such diagram for the Sun and Earth:http://www.johnstonsarchive…

I'm loosely considering different materials for flashlight building and I would like to understand more about the physics of heat conductivity and convection. Most mainstream flashlights are built from aluminium, the more expensive ones for collectors are copper, titanium and rarely some exotic alloys. Copper being the best conductor of heat (price wise) is often used as a shell of high end flashlights which produce high amounts of heat. My question is this...comparing Lead and Aluminium (for ease of discussion, I'm not actually considering building a flashlight out of lead). Lead is roughly 5 times denser than Aluminium and is also roughly 6 times less thermally conduc…

Let say I want to obtain a semiconductor with mixed electron-hole conductivity by doping. Typically it's not going to succeed because donor and acceptor admixtures (electrons and holes) are going to recombine with each other. How can we prevent recombination and preserve mixed conductivity? It is claimed that free electron and a hole (valence electron) cannot recombine if they have aligned spins. Can there be a material in which all the free electrons and holes have aligned spins? Can this state (and mixed conductivity) stay for indefinitely long period of time?

Last week I in Britain was moving a fireplace and moved it back but was on a cable off balanced. Few hours later it fell. Could of been cars going past, could be a useful earth shift detector. Are earth quake detectors small? What do you think?

what is hotter wire or large area of sand like on a beach. I said the sand because of the area, mass and air surrounding the wire vs the sandy ground or beach. would like to see if i am correct I am far from intelligent scientist just would like to know the answer and what everyone has to say. Please and Thank you

Hello, I was commissioned at work to design, engineer, and build, an electromagnet prototype that has a dial on it that can be turned up or down to increase/decrease the power of the magnet. It needs to be able to lift 30 pounds. So I've gotten the formula that the strength of the magnetic field is related to turns times amps. However, how can I relate this formula to newtons of force applied at a given distance? Ironically, my boss didn't specify if it needs to be able to lift a weight of 30 pounds from 12 inches away, or direct contact. So I'm assuming he wants 30 pounds from 3 inches away. That I believe can be plugged into the f…

https://www.popsci.com/science/article/2012-09/book-excerpt-there-no-such-thing-time I was kicked out of a physics forum for saying what this Popular Science article says. I said time does not exist, only the human act of timing. All that exists are matter and energy moving faster or slower relative to one another. The moderator argued with me and got meaner and meaner and finally kicked me out.

Hello I hope this is the right forum, apologies if not. Just a novice and reading about safety, circuits, short circuit, current etc and The Earth is often mentioned. What has the Earth got to do with it? Hope to hear from you.

Does anybody know the answer? Google searching why do two objects fall at the same rate in a vacuum, I found this: "The mass, size, and shape of the object are not a factor in describing the motion of the object. So allobjects, regardless of size or shape or weight, free fallwith the same acceleration. In a vacuum, a beach ballfalls at the same rate as an airliner." The three objects: the earth, a feather, and a cannonball, would all move toward each other in ratio to there size? So if you replace the earth with say a brick, and you put each thing at the corner of an equilateral triangle, the three objects wouldn't meet in the middle, the feat…

There are many types of hot air balloons. I realized that some of them contain many gores (as much as 24) and some contain less which makes a great difference in the shape. 18 gores 3 gores 24 gores What I am wondering is the difference that the number of gores make in the flight of hot air balloons. 3-gored balloon's shape is much different than 24-gored balloon, does it affect its flight in any way? (e.g. buoyancy or air resistance) If not, what else might it affect? Why might people choose to make balloons with more/less gores? The ima…