More skills we've been learning

In physics, we've been learning even more skills! We first learned converting between metric units. It sounds complicated, but it's actually really easy after you understand how to do it. When converting, I always reference this chart-

KHD(base)dcm. 

K: kilo

H:hecto

D:deca

d:deci

c:centi

m:mili

Your base unit could be meters, grams, or liters. The largest number is on the far left. Smallest number on the far right. I remember the saying as King Henry Died (base) drinking chocolate milk. What makes this really easy is each unit is based on a power of 10. You move the decimal point either to the left or right. 

Here are some example problems-

1.) 6 l.=_ ml.

             .000006mm

2.) 50mg=_ kg

            .00005 Kg

3.) 25 Km=_cm

            2500000 cm

We also learned scientific notation- 

1. 9,000,000=9•10^6 

2. 9,260,000= 9.26•10^6

3. .000006=6•10^-6

Dimensional analysis-

You use dimensional analysis when you have two units that do not have the same base, such as meters, grams, and liters.

An example-

1. 30 miles

  __________    = _ m/s.

       hr.

  

30miles.    1 hr.        1.609 km.    1000 m

______   • ______   • _______.  •_______

1 hr.        3600 s.       1 mile.          1 km

Answer- 13.41m/s

Dimensional analysis is the toughest subject that we learned so far. After doing a ton of practice problems, I think that I have it down pat. 

 

I think sooner than later, we are coming to an end with learning science skills, and will finally start doing physics soon! Very excited!