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

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Does a person using a skateboard expend less energy than a walking person traveling the same distance?

3524 upvotes

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If photons have no mass, how can a laser beam bore a hole through something? Wouldn't the equation E=MC^2 resolve to 0=0?

3387 upvotes

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Microwave Ovens: What is the relationship between the power level selected and the cooking time?

30 upvotes

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What prevents the bacteria in the human intestinal tract from over-proliferation?

9 upvotes

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During clinical drug trials, what safeguards are taken to prevent/reduce unknown side effects from causing more "damage" to participants than the possible positive results of the medication being used?

2 upvotes

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Is there any proof yet that someone who has been infected with Covid-19 and recovered has developed an immunity to becoming infected again? If no, how can a population ever develop a "herd immunity" if basically everyone would still be at risk of becoming infected yet?

1 upvotes

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What is the best way to dispose of this waste material? (See text for description)

1 upvotes

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Why would our brains convert an "upside down" image on the retina to a perception of "rightside up"?

1 upvotes

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How would the mathematics of the following "card game" be calculated? (see text below)

1 upvotes

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If the universe ("space") is expanding (and we know that by observing the red shift phenomena of objects moving away from us), why don't we observe/perceive the same thing within our own solar system?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Does a person using a skateboard expend less energy than a walking person traveling the same distance?	3524
If photons have no mass, how can a laser beam bore a hole through something? Wouldn't the equation E=MC^2 resolve to 0=0?	3387
Microwave Ovens: What is the relationship between the power level selected and the cooking time?	30
What prevents the bacteria in the human intestinal tract from over-proliferation?	9
During clinical drug trials, what safeguards are taken to prevent/reduce unknown side effects from causing more "damage" to participants than the possible positive results of the medication being used?	2
Is there any proof yet that someone who has been infected with Covid-19 and recovered has developed an immunity to becoming infected again? If no, how can a population ever develop a "herd immunity" if basically everyone would still be at risk of becoming infected yet?	1
What is the best way to dispose of this waste material? (See text for description)	1
Why would our brains convert an "upside down" image on the retina to a perception of "rightside up"?	1
How would the mathematics of the following "card game" be calculated? (see text below)	1
If the universe ("space") is expanding (and we know that by observing the red shift phenomena of objects moving away from us), why don't we observe/perceive the same thing within our own solar system?	1