Reducing Wave Speed by Half: Understanding the Equation and Its Components

[cseet]

Hi all,
can anybody pls explain what is reduce the wave speed by factor of 2?

question:
original v(string) = 265m/s
F (tension) = 500N
m (mass) = 0.005kg
l (length) = 0.7m


Equation:
v = sqrt of [F / (m/l)]
therefore m = (F * l) / v square

but I though reduce speed by the factor of 2 = divided by 2?? pls kindly advise.
thanks
cseet

 

[cookiemonster]

Reduce by a factor of 2 does mean divide by 2.

cookiemonster

 

[cseet]

Hi Cookiemonster,
that's what I thought, but when I did the equation, the answer I got is 20g but the answer is 15g... can you explain that?
thanks
cseet

 

[cookiemonster]

What exactly is the question? I thought all you asked was what reducing by a factor of 2 meant.

cookiemonster