Is it a coincidence that all elements are present on Earth? |
- Is it a coincidence that all elements are present on Earth?
- How were the first perfectly straight molds/outlines first manufactured?
- Since the moon we see reflects the sun’s light, does that mean the earth also reflects the suns light and from space it looks as bright as the moon?
- If substances like salt lower the freezing point of water, is there anything that raises it?
- Is fast-food like McDonalds healthier now that technology has advanced since 1940 when it was first established or the opposite?
- What elements make up dirt/sand? Is it a bunch of different elements? Is that why there is so much of it?
- How do we still have radioactive elements billions of years after earth formed?
- Is the earth's iron core smooth or textured?
- How does antibacterial soap kill bacteria?
- What time do they use in space?
- How do our Organs stay where they're supposed to?
- why are galaxies flat and not spherical ?
- What determines the level of cloud coverage across the globe?
- How straightness is achieved in construction?
- Are the radio waves produced on our planet getting sent out into space equally in all directions are are they directional? Are they strong enough to be received by beings living near other stars?
- What happens if earth's magnetic field reverses?
- Does the iq and intelligence decrease if the brain is not stimulated?
- Why do bright lights leave lingering light in your eyes even after you’ve looked away?
- Why do greenhouse gases work? As far as I understand, Earth's temperature emission into space is supposed to only depend on its temperature. Why is reflecting heat back to Earth relevant? Shouldn't the gases themselves heat up and start radiating?
- X-ray powder diffraction - How to calculate the effect of different levels of beam monochromaticity on ring blurring?
- When was it discovered that the Milky Way wasn't the only Galaxy? How did science and the general population respond to it?
| Is it a coincidence that all elements are present on Earth? Posted: 03 May 2018 02:06 AM PDT Aside from those fleeting transuranic elements with tiny half-lives that can only be created in labs, all elements of the periodic table are naturally present on Earth. I know that elements heavier than iron come from novae, but how is it that Earth has the full complement of elements, and is it possible for a planet to have elements missing? [link] [comments]  |
| How were the first perfectly straight molds/outlines first manufactured? Posted: 02 May 2018 08:39 PM PDT This question keeps me up at night. We have perfect (or seemingly) perfect circular/straight objects, but how were the machines/molds used to create them created so perfectly straight? This probably only makes sense in my mind, honestly. [link] [comments]  |
| Posted: 02 May 2018 10:50 PM PDT |
| If substances like salt lower the freezing point of water, is there anything that raises it? Posted: 02 May 2018 02:37 PM PDT |
| Posted: 03 May 2018 03:58 AM PDT |
| Posted: 03 May 2018 05:29 AM PDT |
| How do we still have radioactive elements billions of years after earth formed? Posted: 03 May 2018 05:46 AM PDT To our current understanding, the Earth is about 5 billion years old, and formed from a dead star before it (why we have heavier elements). I'm curious as to how we still have elements with half-lives that formed so long ago? [link] [comments]  |
| Is the earth's iron core smooth or textured? Posted: 03 May 2018 05:48 AM PDT It seems highly unlikely that it's lumpy, for obvious reasons, but it also seems possible that it could either accrete elements during the spin or even hold an uneven halo of materials. [link] [comments]  |
| How does antibacterial soap kill bacteria? Posted: 02 May 2018 06:05 PM PDT I understand mechanical agitation and good ol' water can wash away bacteria, but what exactly does antibacterial soap do. Answers that involve organic chemistry are welcome! [link] [comments]  |
| What time do they use in space? Posted: 03 May 2018 03:10 AM PDT |
| How do our Organs stay where they're supposed to? Posted: 03 May 2018 01:26 AM PDT How do our Organs stay in their current spot? Is it just because there's really no room for them to go anywhere else or are there special muscles that keep them there or something like that? [link] [comments]  |
| why are galaxies flat and not spherical ? Posted: 03 May 2018 06:03 AM PDT If I understood right most things in the universe are round (Stars, Planets) because of gravity. However in every picture that shows a "full" galaxy it is flat. Why is that? Is our depiction of the galaxy just overly simplified or is it that way in reality? [link] [comments]  |
| What determines the level of cloud coverage across the globe? Posted: 03 May 2018 03:32 AM PDT Why isn't the Earth covered completely covered by cloud? Why is there always some cloud? If the Earth is completely covered by water, and we have no land mass, would we get even cloud coverage? [link] [comments]  |
| How straightness is achieved in construction? Posted: 02 May 2018 07:01 PM PDT How did we develop first straight objects? For example to create a ruler we need some straightness reference(I assume). Of course nothing will be 100% straight but when you think all the delicate machinary such as medical devices and the machines used in the space we must be pretty close. Is there a way to geometrically approximate to a straight line without a straight device? [link] [comments]  |
| Posted: 02 May 2018 04:55 PM PDT |
| What happens if earth's magnetic field reverses? Posted: 03 May 2018 05:02 AM PDT |
| Does the iq and intelligence decrease if the brain is not stimulated? Posted: 02 May 2018 06:22 PM PDT like imagine if someone stop college and for 3/4 years he do nothing but watching netflix, do you know or have any study showing that his iq or intelligence decrease? Yeah that dude was me [link] [comments]  |
| Why do bright lights leave lingering light in your eyes even after you’ve looked away? Posted: 02 May 2018 05:44 PM PDT |
| Posted: 03 May 2018 05:42 AM PDT |
| Posted: 03 May 2018 03:11 AM PDT |
| Posted: 02 May 2018 09:03 AM PDT |
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