/u/ax0r's posts in /r/askscience

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Lightning is a near-instantaneous event, while the resultant thunder can be stretched out over tens of seconds, with a wide spectrum of varying frequencies. Is the discrepancy just due to the speed of sound? Echoes? Or is there more going on?

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Can we determine from a blood sample only which Covid-19 vaccine a person received? If so, is there any potential benefit to receiving two or more vaccines?

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Other than legislation, what are the current obstacles between us and level 5 autonomous vehicles? How are they being solved?

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Is there likely to be any validity in receiving multiple different types of COVID-19 vaccines?

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Why is Mauna Kea considered the tallest mountain on Earth?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Lightning is a near-instantaneous event, while the resultant thunder can be stretched out over tens of seconds, with a wide spectrum of varying frequencies. Is the discrepancy just due to the speed of sound? Echoes? Or is there more going on?	1
Can we determine from a blood sample only which Covid-19 vaccine a person received? If so, is there any potential benefit to receiving two or more vaccines?	1
Other than legislation, what are the current obstacles between us and level 5 autonomous vehicles? How are they being solved?	1
Is there likely to be any validity in receiving multiple different types of COVID-19 vaccines?	1
Why is Mauna Kea considered the tallest mountain on Earth?	1