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

Year:

Only show posts with narrations

I get that crack is the free base of cocaine chemically, but why does that make it smokable and more powerful?

6588 upvotes

Mark as read: Add to a list

When I turn on the rear defroster in my car I hear the engine RPM drop. Does increasing the demand on a generator increase the force needed to rotate it? If so, how?

5379 upvotes

Mark as read: Add to a list

What is it about the measles virus that makes it transmissible in tiny aerosol droplets but coronavirus and influenza are only transmitted in bigger droplets?

60 upvotes

Mark as read: Add to a list

In videos of nuclear tests, what is the first wave that sort of shakes the dust off of everything a few seconds before the actual shockwave hits and destroys everything?

37 upvotes

Mark as read: Add to a list

What is the process of "turning on" a nuclear reactor?

29 upvotes

Mark as read: Add to a list

What is the electrical current actually doing in am antenna?

21 upvotes

Mark as read: Add to a list

Why don't Christmas lights get dimmer as you go down the string? Does each light not suck up some of the energy?

11 upvotes

Mark as read: Add to a list

Just finished the Chernobyl series on HBO. Could someone explain what positive and negative void coefficients are and why they exist? And what about a reactor design can make such a dramatic difference?

11 upvotes

Mark as read: Add to a list

Trying to learn about ultrasound and I get that sound is reflected at an interface proportional to the difference in acoustic impedance between the two materials but what I can't find is a physical explanation for why that would be the case. Can someone help?

5 upvotes

Mark as read: Add to a list

How did the first transistor work?

4 upvotes

Mark as read: Add to a list

Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
I get that crack is the free base of cocaine chemically, but why does that make it smokable and more powerful?	6588
When I turn on the rear defroster in my car I hear the engine RPM drop. Does increasing the demand on a generator increase the force needed to rotate it? If so, how?	5379
What is it about the measles virus that makes it transmissible in tiny aerosol droplets but coronavirus and influenza are only transmitted in bigger droplets?	60
In videos of nuclear tests, what is the first wave that sort of shakes the dust off of everything a few seconds before the actual shockwave hits and destroys everything?	37
What is the process of "turning on" a nuclear reactor?	29
What is the electrical current actually doing in am antenna?	21
Why don't Christmas lights get dimmer as you go down the string? Does each light not suck up some of the energy?	11
Just finished the Chernobyl series on HBO. Could someone explain what positive and negative void coefficients are and why they exist? And what about a reactor design can make such a dramatic difference?	11
Trying to learn about ultrasound and I get that sound is reflected at an interface proportional to the difference in acoustic impedance between the two materials but what I can't find is a physical explanation for why that would be the case. Can someone help?	5
How did the first transistor work?	4