Physics help with unit conversions!!!?

Question

1.) put the following in order from smallest to largest: 388,000 um<-- (um looks like pm? i don't know if its typo)

2.) a certain water faucet provides 12 cm^3/s. How many liters per hour is this?

3.) A certain plastic has a density of 7.1 g/cm^3. Express this value using SI units.

Answer 1

1.) if you are referring to the Greek letter &quot;mu&quot;, which looks like &quot;µ&quot;, then this stands for micro, or 10^-6. Hopefully that is enough to get you started there.

2.) you know the flow is 12 cubic centimeters per second, there are 3600 seconds in an hour, and there are 1000 cubic centimeters in a liter.

12 cm ^3   |   3600 sec    |    1 liter        |      43200 liter    |    43.2 liters

-------------  x  -------------- x ------------------ = --------------------- = -----------------

  1 sec      |     1 hour     |   1000 cm ^3    |    1000 hour      |     1 hour

so 43.2 liters per hour

3.) I believe the SI units would be kilograms per cubic meter, which converts to 7,100 kg/m^3.

edit: Sorry the math for the second problem didn&#039;t work out so well. I&#039;m putting a bar (|) between the parts that would otherwise be separated by space to make it readable. Sorry about that, good ol&#039; HTML formatting for ya.