Problem 6 Vrms Formula: Mass in kg?

[microsd]

On problem #6, when using the Vrms formula, does the mass have to be in kg because the constant used uses J, which is kg?

 

[Dr.D]

What on Earth is the Vrms formula, and what is J?

Are you aware that the rest of us do not have your textbook, or if we do, it is not opened to the same page you are on?

 

[microsd]

Vrms is root-mean-square speed and J is Joule.