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

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How can they positively test the DNA of King Richard III decedents when there has been so many generations of DNA changes since his death ?

170 upvotes

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Does the Bering sea ever completely freeze over so that you could walk from mainland Russia to mainland Alaska?

31 upvotes

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If two bowling balls were placed a mile apart in outer space (with no other gravitational effects from other objects) would they eventually be pulled together?

7 upvotes

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Why do trains and ships use a diesel engine to run an electric motor? Why don't they just use the engine directly connected to the transmission like cars and trucks ?

5 upvotes

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If gamma rays are pure energy, and are absorbed by lead, what actualy happens to the energy (since energy cannot be destroyed)?

2 upvotes

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Does a 100 pound lead ball have the same amount of potential energy than the 100 pound Plutonium core of a nuclear bomb (and its just more stable)?

2 upvotes

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Is there a functional or scientific use for the concept of infinity?

1 upvotes

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If energy consumes mass, isn't the Earth getting even minutely lighter when energy is expended?

1 upvotes

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If 67P/Churyumov–Gerasimenko is only a few km wide (with corresponding gravity) why didn't "Philea" bury itself in the relatively loosely packed dust when it landed?

1 upvotes

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Why do some refineries have open flames coming out of stacks...couldn't they use the heat from those flames to run a turbine to provide energy??

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
How can they positively test the DNA of King Richard III decedents when there has been so many generations of DNA changes since his death ?	170
Does the Bering sea ever completely freeze over so that you could walk from mainland Russia to mainland Alaska?	31
If two bowling balls were placed a mile apart in outer space (with no other gravitational effects from other objects) would they eventually be pulled together?	7
Why do trains and ships use a diesel engine to run an electric motor? Why don't they just use the engine directly connected to the transmission like cars and trucks ?	5
If gamma rays are pure energy, and are absorbed by lead, what actualy happens to the energy (since energy cannot be destroyed)?	2
Does a 100 pound lead ball have the same amount of potential energy than the 100 pound Plutonium core of a nuclear bomb (and its just more stable)?	2
Is there a functional or scientific use for the concept of infinity?	1
If energy consumes mass, isn't the Earth getting even minutely lighter when energy is expended?	1
If 67P/Churyumov–Gerasimenko is only a few km wide (with corresponding gravity) why didn't "Philea" bury itself in the relatively loosely packed dust when it landed?	1
Why do some refineries have open flames coming out of stacks...couldn't they use the heat from those flames to run a turbine to provide energy??	1