Review and consider the existing means that we can use to detect the presence of advanced civilizations in the general (within 100 ly) stellar neighborhood.
This could be by electromagnetic or chemical means.
First figure out what to look for and then figure out how to look for it.
A simple (perhaps too simple?) way to think of a black hole is that it has essentially three regions.
Its "surface" would be the event horizon. We can only see stuff that is just above this surface, probably just glowing gas and particles. Anything that passes thru (going down into) the...
To overcome mechanical inadequacies it is very common to use several vacuum pumps in series. One pump feeds the next and the next... To get really high vacuum they use different types of pumps in stages.
Helium would not work. In a short time the difference in density would cause there to be too much oxygen at low altitudes as the helium tended to escape from the planet...
Oxygen/nitrogen works cause they have close to the same mass, oxygen about 16 and Nitrogen about 14. But Helium is about...
It is thought that the rotation of large bodies (planets) is a remnant from the rotational forces present during the formation of the solar system from the primordial cloud.
For the larger planets this rotational energy is dissipated very very slowly. Smaller objects such as the Earth's moon...
There are many plastics that could do this, typical glass filled nylon will do fine.
You would first have to an FEA analysis on your part to see what dimensions it would have to have to be as stiff as you need.
No, it does not.
Imagine this example. You have two identical springs. They are both extension springs with loops on each end, they are hanging from pegs. One of the springs is under tension because there is a weight hung from it. This weight is not enough to plastically deform the spring...
Almost an off the shelf solution is to get an Android phone, obdkey bluetooth interface and the torque android application. Oh, and your truck must be a 96 and up model with OBDII.
You can position the phone so its image is reflected by the windshield. Works best at night.
What you described is called "sulfating" and will occur in normal automotive lead acid batteries if they are fully discharged a number of times. Some lead acid batteries, known as deep discharge, are more resistant to this.
Different battery chemistry (non-lead acid) may also suffer from...
Yes, there are thermo-electric generator modules that use a thermocouple effect. But as Mender pointed out they are not very efficient. Could they be made better? Yes. It would be a big project and if it was easy someone would be working on it.
What would be very clever would be to print the cards with conductive ink in a pattern that would allow the cards to act like RFID tags...
Then a RFID reader on a wrist band could "somehow" signal you what card is what.
Yes, a FBD would be the way to go. After that you should add any axial loads and combine the results from the bending & moment results with a Morh analysis.
I am curious where you got the downward force at point b on your diagram. And while you might think that the vertical loads at the...
More important then the shelter and supplies might be where it was. Provided that the impact was not very close by I imagine that a location in a mountainous region would be best. This sort of area would allow you the possibility to migrate to either lower or higher altitudes as required by...