/u/Alphabunsquad's posts in /r/askscience

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Could a solar sail spacecraft carry its own laser emitter to provide propulsion or does a laser push its own emitter backwards?

231 upvotes

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Geology (and some astronomy) question: Why do we find elements and compounds in veins and generally clumped together in the earth?

44 upvotes

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Does velocity or acceleration cause time dilation?

1 upvotes

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Is there any postulation in physics community that there are countless forces and particles that simply don’t interact with our four fundamental forces in anyway and thus we can’t experience them? Is this a possible explanation for fine tuning?

1 upvotes

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In the same way that birds can be considered reptiles, can mammals be considered amphibians?

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If plants like dandelions, sunflowers, garlic mustard, and so on aren't trees, shrubs, grasses, vines, or mosses, then what are they?

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Does Astronaut Chris Hadfield not understand the basics of physics or am I losing my mind?

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How often is the earth ever not in an ice age? If we are in the middle of an an interglacial period but is still technically an ice age then what is a non ice age called?

1 upvotes

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Why are there so few (four) kinds of reptiles and so many kinds of mammals?

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If you travel close to the speed of light, distance will contract but will everything also get brighter?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Could a solar sail spacecraft carry its own laser emitter to provide propulsion or does a laser push its own emitter backwards?	231
Geology (and some astronomy) question: Why do we find elements and compounds in veins and generally clumped together in the earth?	44
Does velocity or acceleration cause time dilation?	1
Is there any postulation in physics community that there are countless forces and particles that simply don’t interact with our four fundamental forces in anyway and thus we can’t experience them? Is this a possible explanation for fine tuning?	1
In the same way that birds can be considered reptiles, can mammals be considered amphibians?	1
If plants like dandelions, sunflowers, garlic mustard, and so on aren't trees, shrubs, grasses, vines, or mosses, then what are they?	1
Does Astronaut Chris Hadfield not understand the basics of physics or am I losing my mind?	1
How often is the earth ever not in an ice age? If we are in the middle of an an interglacial period but is still technically an ice age then what is a non ice age called?	1
Why are there so few (four) kinds of reptiles and so many kinds of mammals?	1
If you travel close to the speed of light, distance will contract but will everything also get brighter?	1