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Answer this physics question. Actually dont answer it, just tell me wtf is going on.

lol...I wish my physics questions were that easy. Also, yeah, that is the correct answer for the second question, so wtf?
 
oh i figured out what i did. thanks a lot man.

anyone wanna take a stab at this one?

How fast must an average pion be moving to travel 17 m before it decays? The average lifetime, at rest, is 2.6×10^−8 s.

😀
 
Were you like 8 when you joined this forum? 🙄

How fast must an average pion be moving to travel 17 m before it decays? The average lifetime, at rest, is 2.6×10^−8 s.
Click to expand...
Velocity is distance over time. You have the distance - 17m - and you have the time - 2.6^10-8 s.
 
kazaam said:
oh i figured out what i did. thanks a lot man.

anyone wanna take a stab at this one?

How fast must an average pion be moving to travel 17 m before it decays? The average lifetime, at rest, is 2.6×10^−8 s.

😀
Click to expand...

Wouldn't it be D/S

So 17 divided by the number given, provided a moving pion doesn't decay any faster or slower when it moves at that ridiculous speed (also assuming it doesn't go faster than the speed of light)
 
kazaam said:
Err, no it wasnt that easy. It was actually pretty effing long. 🙁 The answer was .90889c.

thanks everyone!
Click to expand...

How would it be long? Isn't the only other thing it needs to take into account gamma from what the others said?
/might fail at physics...
 
Aflac said:
Were you like 8 when you joined this forum? 🙄


Velocity is distance over time. You have the distance - 17m - and you have the time - 2.6^10-8 s.
Click to expand...

At those speeds, I think you need to worry about special relativity.
 
Hmm, the answer I got was 2.7E8. Hopefully that's right.

Use the equation

dt=dti/sqrt(1-v^2/c^2)

where dti is the time of the pion at rest. Then use the equation d=vdt, solve for dt, plug that into the first equation, then solve for v. d=17.
 
Last edited:
Hacp said:
Join date was 2000. Were you like 9 when you joined?
Click to expand...

Hacp said:
Hmm, the answer I got was 2.7E8. Hopefully that's right.

Use the equation

dt=dti/sqrt(1-v^2/c^2)

where dti is the time of the pion at rest. Then use the equation d=vdt, solve for dt, plug that into the first equation, then solve for v. d=17.
Click to expand...

you are wrong. i love how the two people that have given me shit here get the answer wrong. i agree that i do suck complete ass at math, physics, and chemistry too though.
 
kazaam said:
you are wrong. i love how the two people that have given me shit here get the answer wrong. i agree that i do suck complete ass at math, physics, and chemistry too though.
Click to expand...

Huh? Looking at the link you provided, I am pretty much right. If you suck at those subjects you'll never pass the mcat btw.
 
Last edited:
Hacp said:
Huh? Looking at the link you provided, I am pretty much right. If you suck at those subjects you'll never pass the mcat btw.
Click to expand...

ah, my b. i didnt see you multiplied it by c.

yeah i didnt do too great on the mcats, but not awful. im beginning to think that i dont really want to follow this path but we shall see.
 
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