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

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If radar guns detect the fastest moving object in their view, wouldn't they detect the top of the tire rather than the car itself?

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If in electrical systems electrons flow from negative to positive terminals, why is the negative/ground terminal not considered the "hot" terminal?

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What's the practical difference between the different types of electrical "switches"? I know of transistors, relays, optocouplers, and there are likely more. What factors would lead an engineer to choose one over another?

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What's the difference between polyurethane sealant and polyurethane adhesive? Both say "100 percent polyurethane" on the package.

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How many times does a metal straw need to be used before it offsets the environmental impact of a plastic straw?

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Are "net-zero" homes actually good for the environment?

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What's the strongest possible movement the human body can make for any distance?

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Are math "rules" like BEDMAS and FOIL universal rules or just worldwide conventions? If we encountered a sophisticated alien race would they have the rules in their math?

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Why am I able to so easily recognize recorded messages on the phone? Shouldn't it being transmitted "flatten" both types of sound?

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Are birth marks ever literally caused by the birth?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
If radar guns detect the fastest moving object in their view, wouldn't they detect the top of the tire rather than the car itself?	1
If in electrical systems electrons flow from negative to positive terminals, why is the negative/ground terminal not considered the "hot" terminal?	1
What's the practical difference between the different types of electrical "switches"? I know of transistors, relays, optocouplers, and there are likely more. What factors would lead an engineer to choose one over another?	1
What's the difference between polyurethane sealant and polyurethane adhesive? Both say "100 percent polyurethane" on the package.	1
How many times does a metal straw need to be used before it offsets the environmental impact of a plastic straw?	1
Are "net-zero" homes actually good for the environment?	1
What's the strongest possible movement the human body can make for any distance?	1
Are math "rules" like BEDMAS and FOIL universal rules or just worldwide conventions? If we encountered a sophisticated alien race would they have the rules in their math?	1
Why am I able to so easily recognize recorded messages on the phone? Shouldn't it being transmitted "flatten" both types of sound?	0
Are birth marks ever literally caused by the birth?	0