Classical Physics

Just wondering what people think.

Two methods for generating electricity with explosives: Method 1 Step 1: Build a cavity in the ground ten times as deep as it is wide. The deeper the cavity the more you increase the efficiency of the system to a point. Step 2: Line the bottom 10% of the cavity with steel Step 3: operate a turbine generator by lowering water weight from the top of the cavity to the bottom and dumping the water in the cavity. Step 4: Once the cavity is about 10-15% full of water a fusion explosive is detonated near the bottom of the pool of water. The water is cleared out of the cavity and caught inside a loop connected to and situated on the ground at the top of …

As per sketch a 2 meter long tube is mounted on the left arm of a seesaw and this see saw is balanced due to counterweight.there is a 10 kg mass ball located in the in rest position in the tube.See the link.Now seesaw is balanced at 180 degree angle.when I tilt it this balanced seesaw then the ball fall down from 2 meter height and hit with upper part of tube .but interesting after hitting the seesaw will get back it's initial position without any external influence.so ball will again fall from 2 meter height.in this way the ball will fall down twicely but the main interesting point is that the input energy is almost zero as there is no torque due to counterweight.There w…

Consider the following: The probability of an electron being at any single point within an orbital domain approaches zero. The probability of an electron being in a defined area of an orbital domain is directly proportional to the dimensions of the defined area and inversely proportional to velocity. The area of an orbital intersection with the plane of the nucleus is a single point, thus the probability of an electron being in the orbital plane approaches zero. Comments?

The picture below shows an image of a bed from a 3d printer, which I intend to equip with an array of 15 x 3 mm Neodym magnets to hold down a steel plate. The steel plate itself is not and can not be equipped with magnets. Theres a heated aluminium bed between magnets and steel plate and the magnets are specified to withstand 150°C.The left side shows all 12 magnet arranged with the same orientation, on the right side every second magnet is flipped. The distance between the magnet is wide enough so they don't noticeably attract/distract/disturb each other.Question: The goal is that the steel plate lays flat (Z direction) and does not accidentally move in XY direction. Is …

How do they relate? If velocity increases magnetic moment, is charge affected?(Lenz's law).

Hello, my question may sound ridiculous, but I'd REALLY like to know : if you send light into a "box" , the sides of the box being covered, inside, with mirrors : how long will light "survive" in the box ? If you drill a side of the box 20 years later, for example, will you see a beam of light ? I DO want to know the answer ( which probably depends on the quality of the mirrors ). Thanks in advance for your answers, Zant555.

FORCE / TORQUE CALCULATIONS Hi, Not done this sort of things since college days. Some input would be much appreciated. Please refer to the attached .pdf. The diagram is a schematic drawing only. In order to determine the weld size, I need to calculate the force (N) at the diameter of the welds (888mm). The inner flange is driven by a 250 kW motor which has a rotational speed of 42 rpm. Given that motor power Kw=(T*rpm )/9552.4 where T=Torque (N m).  T=(kW*9552.4)/rpm  T=(250*9552.4)/42  T=56859.5 N m I calculate that the force at the weld diameter to be:- force at weld=56859.5*((888/2)/1000)  force at weld=128062 N I …

I'm wondering if it's possible to use the gravitational field of a massive object to decelerate a spacecraft moving at high velocity. An example is this: if a spacecraft moving purely on inertia at one percent light-speed performed a flyby of a one sol mass neutron star (or black hole) at a given altitude, would the gravity field cause the spacecraft to swing round the star, slow it up or else deflect its trajectory in a meaningful way? According to one online calculator the escape velocity of a solar mass neutron star at a distance of 25,000 km equals 3,000 km/s or 0.01 c. At this distance the tidal pull exerted by the star's gravity would be minimal, therefore represent…

So, suppose an unlucky astronaut went out of the airlock of ISS naked for whatever reason. Let's say it was because of "space dementia" Obviously, they are going to pass out in a few seconds and die within a couple minutes, but what would happen with the body? It would spend slightly more than half of the time in light compared to the dark, because of Earth's atmosphere bending the light. Based on what I could find, black body radiation of human body would be around 100 W, whereas the solar radiation would give in excess of 1500 W. Only part of those 1500 W would be in IR, but still the amount of infrared should be sufficient to more than compensate for the radiative…

How does potential energy actually turn into kinetic energy for a falling object? If I have two objects that aren’t in any way energized, motionless in space, how do they start moving? Each time I watch for this question it’s always “Gravitational force” which explains absolutely nothing. Energy can’t just start existing, so how does it work?

I ve been searching for formula I need for so long so I came here. SO: I need a formula that expresses mehanic energy needed to levitate another magnet by electromagnet. Idea is to express electric energy needed to levitate a magnet using electromagnet and than convert electric energy needed to mehanical energy. Allso I want to know what parameters do you need to calculate this energy (like mass). P.s. Eanglish is not my first language so if I didn't specify something or left something unclear, please ask me what I ment. Thanks for your help

Is this true? Mass always has momentum (in some frame) but momentum isn’t always allied to mass.

If an asteroid 2158 miles wide (twice the radius of the moon) with twice the density of the moon (6.68 grams per cubic centimeter) were to come close to hitting earth perfectly parallel to earth's orbit around the sun near the northern hemisphere while it's facing directly opposite to the sun at mach 7 (seven times the speed of sound) but miss by 119450 miles (half the distance from the moon to the earth), exactly how much gravitational influence would that asteroid have on the earth's orbit around the sun and what would happen in terms of tidal movements on earth?

why shining material is hot when it is kept to the sunlight

I'm trying to illustrate the importance of wearing a seat belt properly, specifically when people wear seat belts over their mid stomach, instead of their pelvic girdle. In figuring out the force applied to a passengers abdomen when the car hits an object and the person's inertia drives them into the seat belt, is it necessary to the factor in the area of the seat belt? I'd think it would be important because of P = F/A. Hence the seat belt is maybe 2 inches in width, so it's going to produce way more damage that if it were 20 inches in width. Also, how would you calculate the force of the person moving forward? Just a standard momentum calcu…

LIGO stellar electromagnetic gravitational waves that are formed by a black hole are detected using Michelson's laser interferometer based on Einstein's general relativity. "The essence of general relativity is that mass and energy produce a curvature of four-dimensional space-time, and that matter moves in response to this curvature. The Einstein field equations prescribe the interaction between mass and space-time curvature, much as Maxwell's equations prescribe the relationship between electric charge and electromagnetic fields. Just as electromagnetic waves are time dependent vacuum solutions to Maxwell's equations, gravitational waves are time dependent vacuum…

This is a purely technical matter. I have consulted a few textbooks on Optics and Photography, but found no clear answer. I hope someone in this forum will be able to help. As anybody who has used a camera will know, you can regulate the amount of light that falls through a lens in three different ways: - the sensitivity of the film (ISO-norm) or the sensors (digital cameras); - by a longer or shorter exposure (shutter speed); - a wider or smaller aperture. My problem concerns the last method. Obviously, the larger the aperture the more light will fall on the film or sensors. What I do not understand is how the field of view can remain u…

Hello. I want to clarify something. I understand Real physics, like as an Engineer and Mechanic. For example, I understand how to Build a car with the correct gear ratios, I understand what the drivetrain does as well. The math of the equations I also understand, the math is very easy for me. What I don't understand is the theory, or philosophy of the equations. In real life, I know that a small gear rotating fast, will give a large, slow gear much strength. But I don't truly understand why it does, it seems like magic to me. When I look at the equations I just get more confused about this. What I'm trying to figure out is what is the equation …

When a train moves it hits the air which in turn gets energized and converts to wind.This energized air becomes so due to transfer of energy from the moving train.This can be felt so obviously if one stands a little close to the side of a fast moving train.This train made wind can produce(partially) potential electric energy by installing suitable size wind turbine generators on both sides of the railway track.

The photon wave collapses when it comes into contact with something. Why does it not collapse when it passes through the screen with the slits? Why does it split into two waves? THank you.

When we detonate a nuke, it releases way more energy then what it took to detonate it, after the initial energy we apply the particles we split causes a chain reaction, this chain reaction ends up releasing massives amounts of energy. it seems we literally get free energy in a sense, I think that if we could find a way to control and maintain this chain reaction then we could probably harness some of that extra energy thats being generated by the chain reaction. I must be missing something because to me, nukes clearly demonstrate that it is indeed possible to get more energy out then what we put in.

I am 33 and so I have started to read again the book "Reading The Mind Of God" ... It is inspiring me to become a scientist. I love to think about and work out the mysteries of the Universe. This book is about the principle of Universality and the quest to search for it. I previously studied engineering and lost interest, dropping out of college a few times. After that, I wasted another 6 years or so of my life at home, suffering from severe depression and not doing much. (unable to find inspiration and motivation). Now my dream is to be able to return, complete my degree and then do a PHD and become a full time researcher and scientist like Richard Dawkins , Neil Degrass…

You know whenever you shoot gun right it makes a loud boom I know its just the bullet going faster than sound. but why does it have to make a big boom

Trying to get my mind around this if you had a motorised arm that was capable of spinning an object 100mm from it's centre at 3000 kmh how long would that arm have to be for the object at the tip of it to be travelling light speed?