How many generations does it takes before medical history becomes irrelevant? |
- How many generations does it takes before medical history becomes irrelevant?
- Why does being infected with vaccinia virus vaccine protect you from Smallpox but doesn't protect you from other "pox" such as chicken pox?
- Why cant we use nuclear fuel until it's spent?
- How does polarization matter in Sisyphus cooling to millionths of a degree above Zero?
- How Do Aircraft Rudders Work?
- Can we attach a sail of some sought to an asteroid to redirect it?
- What determines the length of the unburned wick remaining above the candlewax?
- How do we know the exact age of the earth?
- what breakthrough has Cassini provided us with?
- Could we slingshot an object around planets or the sun to get close to the speed of light?
- When it comes to massive projects like designing a rocket from the ground up (as SpaceX has done, for example), where does one even start?
- How do we determine sea level?
- Why don't we drop atomic waste packaged in lead spheres into the Mariana Trench? (Or the remainders of Fukushima for example)
| How many generations does it takes before medical history becomes irrelevant? Posted: 29 Aug 2017 04:02 PM PDT |
| Posted: 29 Aug 2017 08:18 PM PDT Due to my career field I was recently given the vaccinia virus because I was told it's a more "mild" form of small pox, this peaked my interest and I learned the difference between vaccinia and variola virus(small pox) but could not find an answer to my question in regards to the varicella virus (chicken pox). I probably have a misinterpretation on the correlation of the word "pox" but I'd like to know, thank you! [link] [comments]  |
| Why cant we use nuclear fuel until it's spent? Posted: 30 Aug 2017 03:48 AM PDT We use plutonium and uranium to fuel our nuclear plants. In hospitals, they're used in xray machines. At a certain point, they are considered "spent", but still contain enough energy to be considered a problem. Why can't we use them until they're gone, just like a log would be just carbon and water vapor when it's burnt out? [link] [comments]  |
| How does polarization matter in Sisyphus cooling to millionths of a degree above Zero? Posted: 29 Aug 2017 05:55 PM PDT I was just reading about a molecule being cooled to 50/106 degrees above zero. The article referenced a higher temperature which could be obtained through Doppler cooling, but that this technique had limitations. The mechanism for Doppler cooling and it's limit makes intuitive sense to me, to the extent that I could probably calculate the limit for simple cases. However this new record required a technique called Sisyphus cooling which I do not really understand. The wikipedia article on it wasn't terribly informative for me either. Can circularly polarized light be effective in cooling by this mechanism, or does it have to be linear? How does light polarization effect orbital interaction? I've always assumed it was just a scalar energy involved in electron absorption of a photon. Any direction towards further reading that would help me understand this would be appreciated. Original article which piqued my interest: https://www.sciencenews.org/article/molecules-face-big-chill [link] [comments]  |
| Posted: 29 Aug 2017 08:10 PM PDT How does a rudder work in an aircraft as opposed to a boat? I've read aviation sites and everything is hard to understand. Wings and lift - I think I finally JUST have it. Rudders not so much. Everything in aviation slides around, the fluid friction is so low compared to water. Even a basic turn only barely makes sense. [link] [comments]  |
| Can we attach a sail of some sought to an asteroid to redirect it? Posted: 30 Aug 2017 01:02 AM PDT Edit: My Science teacher told me this. Apparently he has an IQ of 185, and most of the things he says make total sense, but this seems preposterous. [link] [comments]  |
| What determines the length of the unburned wick remaining above the candlewax? Posted: 29 Aug 2017 01:12 PM PDT Say you're burning a candle, why is the sticking out bit of wick that specific size? Is it related to the temperature of the flame or viscosity of the molten wax or something else unrelated? [link] [comments]  |
| How do we know the exact age of the earth? Posted: 29 Aug 2017 10:24 PM PDT When i searched online i found that the method used to calculate the age was radiometric-dating, but then we should only know that the earth is as AT LEAST as old as the oldest rock that was dated. where did the upper bound on Earth's age come from? [link] [comments]  |
| what breakthrough has Cassini provided us with? Posted: 29 Aug 2017 03:52 PM PDT |
| Could we slingshot an object around planets or the sun to get close to the speed of light? Posted: 29 Aug 2017 07:48 PM PDT NASA used slingshotting around earth and the moon and other planets to gain speed. If you slingshot enough times around the right planet, could an object get close to the speed of light? Or is there a limit? [link] [comments]  |
| Posted: 29 Aug 2017 04:09 PM PDT I was just thinking about this as a recent college graduate. There are quite a few things that just completely blow my mind when it comes to the scope of a project. There are so many factors to consider, how are people able to come together to make large projects happen knowing how many things must be done, and what will happen if something is missed? [link] [comments]  |
| How do we determine sea level? Posted: 29 Aug 2017 09:13 AM PDT Do we base it off of some point on land, and then depending on if it raises or lowers from that point we know if the sea is rising? And if that is how we do it, do we measure that point at high or low tide? Also, how often do we change topography maps with the new sea level? [link] [comments]  |
| Posted: 29 Aug 2017 04:50 AM PDT |
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