Can we use Moons gravity to generate electricity? |
- Can we use Moons gravity to generate electricity?
- As the sun burns, is it losing mass, volume, neither or both?
- How can humans share 60% of our genes with bananas?
- Calculating Earth's convex hull?
- Why is it when sunlight passes through rain, it makes a single (or double) rainbow instead of just a bunch of little teeny rainbows that blend back into white light before reaching the observer?
- Why are we immune to some diseases like chickenpox after having it, but not others like strep throat?
- Why copper is used in vacuum insulated travel mugs?
- How much does the total mass of Earth change?
- What’s beneath megaliths like Stone Henge and monuments like the pyramids?
- Why are children especially vulnerable to measles?
- What is the functional difference between fibroblasts and fibrocytes?
- How do USB power adapters convert power from outlets to that usable for our phones?
- How is the tide change in Jupiter, Florida, and Tulum, Mexico only a couple feet, but in South Carolina & other northern places around six to nine feet?
- The age of the Earth and Sun is ~4.5B years. Why isn't Earth burned to a cinder by now, if the sun continually emits light?
- How do large scale shops/malls supply WiFi on such a big scale?
- What is a calorie?
- How do we determine whether an animal is self aware?
- What is the effect from the use of air conditioning for stopping Climate Change?
- Do crows have a season for losing feathers?
| Can we use Moons gravity to generate electricity? Posted: 04 Sep 2018 06:08 AM PDT I presume the answer will be no. So I'll turn it into more what-if question: There was recently news article about a company that stored energy using big blocks of cement which they pulled up to store energy and let fall down to release it again. Lets consider this is a perfect system without any energy losses. How much would the energy needed and energy restored differ if we took into account position of them Moon? Ie if we pulled the load up when the Moon is right above us and it's gravity 'helps' with the pulling and vice versa when it's on the opposite side of Earth and helps (or atleast doesn't interfere) with the drop. I know the effect is probably immeasurable so how big the block would need to be (or what other variables would need to change) for a Moon to have any effect? Moon can move oceans afterall. [link] [comments]  |
| As the sun burns, is it losing mass, volume, neither or both? Posted: 04 Sep 2018 06:24 AM PDT |
| How can humans share 60% of our genes with bananas? Posted: 03 Sep 2018 08:29 PM PDT I understand how we can share 96% of our genes with nonhuman primates. And I understand that we share about 99.8-9% of our genes with other people. But how can share 60% of our genes with a banana, which seems to be the same amount we share with fruit flies? [link] [comments]  |
| Calculating Earth's convex hull? Posted: 04 Sep 2018 02:23 AM PDT I'm curious about Earth's convex hull. That is to say, the minimal polygon that fully encloses the Earth. Where would the land area with the densest points be? Presumably some plains somewhere, without any mountains on the horizon. What if we include the ocean floor? Are there enormous plains somewhere there? Where would the greatest distance between Earth's surface and the convex hull? At the base of some mountain? An ocean trench? Where is the point on the hull which is furthest removed from any other point (loneliest peak)? Where is the longest edge (furthest horizon)? [link] [comments]  |
| Posted: 04 Sep 2018 08:24 AM PDT |
| Posted: 04 Sep 2018 08:20 AM PDT Chickenpox is caused by the varicella-zoster virus and once you get it, you can't get it again because your body has produced the antibodies to fight it. Why is this not the case with strep throat which is caused by either a bacteria or a virus? Can you get sick from the same virus more than once? [link] [comments]  |
| Why copper is used in vacuum insulated travel mugs? Posted: 04 Sep 2018 01:57 AM PDT Some of the vacuum travel mug manufacturers plate the inside walls with copper and claim these flasks have better heat retention than regular stainless steel ones. Does it make any sense? [link] [comments]  |
| How much does the total mass of Earth change? Posted: 04 Sep 2018 06:19 AM PDT I'm guessing a lot of the change is in human influences stuff, but how much do we really affect the total mass of the planet? It it even noticeable? Also, does the mass of the Earth increase at all? Does energy from the sun transfer over into mass once it's utilized by organic life? [link] [comments]  |
| What’s beneath megaliths like Stone Henge and monuments like the pyramids? Posted: 03 Sep 2018 04:29 PM PDT I'm not asking how they were erected. There's lots of theories there. My question is, and I've searched, what kind of base material was used when placing ancient megaliths like Stonehenge? If any? They don't seem to have moved much, if at all. Were they placed deep on aggregate material? Were they just stood on the surface? (Surely not!) The same question applies to menhirs. How are they still securely standing? I've searched and searched and I can find any real answers. Maybe someone is better at Googling than I... [link] [comments]  |
| Why are children especially vulnerable to measles? Posted: 03 Sep 2018 11:30 AM PDT Is it because of a general lack of antibodies, or perhaps because the immune system isn't as well-developed? [link] [comments]  |
| What is the functional difference between fibroblasts and fibrocytes? Posted: 03 Sep 2018 06:09 PM PDT Everything I'm reading online says they're different but fails to really explain how. The functions seem really similar (e.g. fibroblasts are characterized by synthesis of proteins of the fibrous matrix, whereas fibrocytes produce connective tissue proteins such as vimentin and collagens I and III) - if they're both synthesizing proteins for connective tissue, in what key ways are they different? [link] [comments]  |
| How do USB power adapters convert power from outlets to that usable for our phones? Posted: 03 Sep 2018 02:32 PM PDT I understand the concept of a transformer which are able to step-up/step-down voltages, but looking into power adapters there are "flyback transformers" and "rectifiers" which confuse me on what they are and the reason for their necessity. [link] [comments]  |
| Posted: 03 Sep 2018 06:16 AM PDT |
| Posted: 03 Sep 2018 07:47 PM PDT Earth has been orbiting the Sun for 4.543 billion years (from Google). Apparently the sun has never been turned off in this 4.543 billion years. If so, the sun is continually releasing energy in the form of light. Some of that light is captured by the Earth, heating the Earth. Hence, the Earth has been continually heated for 4.5 billion years. Why isn't Earth almost completely molten right now? Sorry if this is offensive. I know Earth is NOT molten, and if it was, life would not exist, but I am asking why the Earth is not molten. [link] [comments]  |
| How do large scale shops/malls supply WiFi on such a big scale? Posted: 03 Sep 2018 01:47 AM PDT How do shopping malls and big supermarkets supply a (considering it's size) stable WiFi connection across such a large area? Sent using a shopping centres WiFi with a solid 20mb download. [link] [comments]  |
| Posted: 03 Sep 2018 10:31 AM PDT Carbohydrates and proteins are totally different molecules and used by the body in totally different ways eg proteins are absorbed into muscle and carbohydrates into glucose. So what is being referred to by the term "calorie"? [link] [comments]  |
| How do we determine whether an animal is self aware? Posted: 03 Sep 2018 02:13 AM PDT |
| What is the effect from the use of air conditioning for stopping Climate Change? Posted: 03 Sep 2018 02:22 PM PDT Can Climate Change be controlled without sharp reduction in the use of air conditioning? This article in The Economist projects that we will soon have a billion new a/c units. [link] [comments]  |
| Do crows have a season for losing feathers? Posted: 03 Sep 2018 02:13 AM PDT I've been seeing crows almost on a daily basis with little to no feathers around the neck area specifically. Do they lose their feathers during different seasons? And why now right before winter when they'll actually be needing feathers to stay warm? [link] [comments]  |
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