Science Forums

# Janus

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1. ## Gravity may be caused by time waves

I checked out the website. In a word: Gibberish.
2. ## [Q] Elliptical orbit

At least 20 Moons, including or own have more elliptical orbits than the Earth does.
3. ## Special relativity (nwobu's effect)

I wish I had a dollar for every time I ran across someone who thought propagation delay can explain away Relativity. Though I must admit that the OP goes above and beyond in terms of self delusion by actually believing that he personally has discovered it, and naming it after himself.
4. ## Well, here is a conundrum

No paradox, because it will not act like shown in the video. When the arm is locked, the seesaw won't behave any differently than when the arm is unlocked and the weight is resting on the end of the arm.
5. ## Launch assist = more payload...?

Another point: By just increasing your exhaust velocity by 10 m/s (about an 0.2% increase), you actually do a little bit better on the payload to fuel ratio than you do by shaving that 10 m/s off the delta v you need.
6. ## There are 2 types of people in the world...

" There are those who, when presented with a glass that is exactly half full, say: this glass is half full. And then there are those who say: this glass is half empty. The world belongs, however, to those who can look at the glass and say: What's up with this glass? Excuse me? Excuse me? This is my glass? I don't think so. My glass was full! And it was a bigger glass! Who's been pinching my beer? And at the other end of the bar the world is full of the other type of person, who has a broken glass, or a glass that has been carelessly knocked over (usually by one of the people calling for a larg
7. ## How would be our Universe if Einstein was right?

Einstein didn't "argue" for a static universe, it was just the prevailing thought at the time he developed GR. He therefore added a "cosmological constant" to his equations to counter the tendency for a such a universe to collapse under its own gravitational pull. Later, when Hubble discovered the expansion, making the cosmological constant mute, Einstein himself called it his greatest blunder. The question now became whether or not the universe was massive enough for its gravitational pull to be able to eventually slow this expansion to a stop and re-collapse the universe at some far d
8. ## What's the biggest earthquake you've experienced?

I was 60 miles South of that one. I was at work. Suddenly it sounded like a group of people where running down the hall of the floor above me. I was like, "what The Heck?" for a few seconds before I realized that it was an Earthquake. I got under cover and when it was over, we all filed out. After a while, we checked the building for damage. We found outside wall in which an existing crack had looked like it had widened. We decided to keep people out of that part of the building until we could get an engineer to look at it.
9. ## Reaching 95% the Speed of Light

An accidental boost from 0.5c to 0.95c would be damn near impossible. It takes 14 times as much energy to reach 0.95c than it does to reach 0.50c. This means your accident would have to release at least 13 times the energy you already expended, and that is if all the energy went into accelerating your ship.
10. ## So what is everyone reading?

Let's see, for Christmas I got: Destroyer of Worlds by Niven & Lerner Unseen Academicals by Pratchett from my wife. 1984 by Orwell from my daughter and The Zombie Survival Guide from my sister I haven't decided which one to start first. I just finished Me of Little Faith by Lewis Black
11. ## The Freedom to Say What You Think or Not? Ban on Blasphemy Proposed.

As R. A. Heinlein put it in an excerpt from "The Notebooks of Lazarus Long": Of all the strange “crimes” that human beings have legislated out of nothing, “blasphemy” is the most amazing--with “obscenity” and “indecent exposure” fighting it out for second and third place.

Thank you.
13. ## Fantastic Contraption

Because without it, this happens: Fantastic Contraption: A fun online physics puzzle game
14. ## Fantastic Contraption

When I try the link it say that it is restricted and that I can't view it unless I by the full version. But your bringing it up reminded me of a solution that I don't think that I posted here. On another board, someone came up with the challenge of solving for U-turn so that the device continually repeats (the target enters the goal, leaves the goal, and then repeats the loop). Here is the solution I came up with. It turned out to be a little trickier than I first suspected. My first several attempts resulted in contraptions that would repeat maybe 2 or three times and then hang up.
15. ## Rockets and Other forms of propulsion

As far as the atmosphere is concerned, straight up is better. That way you are out of the thicker part of the atmosphere before you reach a high enough speed for the friction to be a problem. The reason rockets follow a curve is because they are, for the most part, putting objects into orbit and for that to happen thye have to have a high enough horizontal velocity. So rockets follow what is called a "gravity turn". They slowly level the trajectory so that wehn they reach orbital altitude they have the proper orbital velocity. Gravity turns in reverse are used to land on bodies like
16. ## Photon Matter

Not for any energy of a photon. The wavelength of a photon is inversely proportional to its energy and has a fixed value for any photon of a given energy. For an photon of equal energy equivalnce to an electron, that wavelength is much larger than an electron. Dividing the electron into more photons would require photons of even longer wavelengths. Electrons are not "made up" of photons.
17. ## Photon Matter

Since you mention electrons, let's consider them. We know the mass of the electron, and we also know the maximum size an electron can have. We also know how much energy the mass of the electron equates to. If you consider a photon of the same energy you will find that its wavelength (effective size) is about 10 times that of an electron.
18. ## A relativistic puzzle, and more.

I'm sorry, but I can't make heads or tails of your "puzzle". You show an image of a semi-circle, but what do you mean by it "acts as a ramp". How does it act as a ramp? Where is the ball in this puzzle? I can find no way to reconcile the image with the accompanying text. I also know of no situation where, depending on reference frame, the ball and ramp would act as you describe. You are going to have to do a better job of explaining what you mean.
19. ## Mystery Science Theater 3000

I remember the first episode of MST3K I ever saw, it was "The Cave Dwellers". "Oh look, anal-retentive snakes, they lined up the skulls!"
20. ## Change-a-word!

My girlfriend is stuffing jalapeño tamales while in her edible transparent panties.
21. ## Change-a-word!

My girlfriend is stuffing jalapeño tamales with her magic enhancing bra.
22. ## Relativity Anomaly

They oppose each other, but except for one particular orbital altitude, they do not cancel each other out. This is easily shown by what you have already stated; that clocks speed up with elevation. But what happens to orbital velocity as you increase the elevation of the orbit? it goes down. Thus as the altitude of the orbit increases, speeding up the clock due to altitude increases, and the slowing down of the clock due to velocity decreases. Below a certain altitude, the velocity factor dominates and the clocks run slow, above it the gravity effect dominates and clocks run fast.
23. ## Change-a-word!

My peanut brained farmer is eating pâté of sheeps kidney.
24. ## Change-a-word!

My peanut farmer is denying carnal knowledge of immunoglobulin E .
25. ## Change-a-word!

My peanut whisperer is denying knowledge of anything.
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