I need help with these measurements please?

Question

Please no one tell me to "Do My Homework" I have, and out of the hundreds of problems, these are the ones I could not figure out:

(300. kPa x 274.57mL) / 547 kPa . . .how does this work? I didn't think you could convert a unit of pressure into volume.

As for this next one, it is a plain old "K" not "kL", (isn't K a measurement of temperature on the Kelvin scale?) which confuses me on how I am supposed to convert this:

(346 mL x 200K) / 546.4 K

What units of measurement would you use for:

-temperature of liquid helium (C, K, or F?)

-energy of a moving jet

-mass of a fingernail (centigram, decigram, gram, or miligram? I'm not sure)

also, what is a "derived unit?"

Answer 1

Are you sure these are represented correctly?  The first one looks like it could be related to Boyle's law or the ideal gas law. Maybe that denominator is just K?

The second one doesn't make sense to me standing by itself.  If both those units are K, then it's asking about how the volume changes as temperature changes from 200 to 546.4 K.  But conversion?

-temperature of liquid helium : K

-energy of a moving jet: joules

-mass of a fingernail:  grams  Never weighed one, but I'll bet it's > 1g, and decigrams and centigrams are used rarely; ordinarily if it were < 1g you'd use mg.

Seven "base units" are defined: meter, kilogram, second, ampere, kelvin, mole, candela.  All other units are "derived" from them. See

http://en.wikipedia.org/wiki/SI_derived_...

You really should start with Google and Wiki.  Best thing since a genius roommate.