Chapter 1

What do these have in common? Odd one out???

Measuring = units MASS 1 kg LENGTH/DISTANCE 1 m TIME 1 s

CONVERT 1 kg = pounds 1 meter = feet 1 s = 1 s

Scale of the Universe  A super cool applet A super cool applet

Convert, use Scientific Notation

Examples

Practice days to seconds _____________________ 3.5 km to mm ___________________________ 43 cm to km ____________________________ 22 mg to kg _____________________________ 671 kg to µg _____________________________ 8.76 x 10 7 mW to GW _____________________ x s to ps ________________________

Precision & Sig. Dig.

LAB on Precision  1) Use the solid 1 m stick and measure the length of the lab table  2) Use the 1 m stick marked with dm  3) Use the 1 m stick marked with cm  4) Use the actual meter stick to measure the length of your desk.  Write down the results to the maximum precision in each case.

SIG FIGS MADE SIMPLE

Sig. Fig

Practice The value of the speed of light is now known to be ×10 8 m/s.Express the speed of light in the following ways: a) 3 SF b) 5 SF c) 7 SF

How many Sig.Figs? m/s 3.00 ×10 8 m/s °C °C J MHz

Adding and Subtracting # of digits 0.______ (after the decimal point) = the least precise = = – = = 52.2

A QUICK SELF-CHECK  kg ___________  h _____________  mi _____  g ____  750 in ______  s ______

Multiplying and Dividing #SF (result) = the least #SF (A*B) 1.34 x 2300 = 3082 = 3.1  10 3 #SF (result) = the least #SF (A/B) / 45 = = 5.3  10 2

Practice Bicyclists in the Tour de France reach speeds of 34.0 miles per hour (mph) on flat sections of the road. What is this speed in a) km/h and b) m/s - ? 1 mile = 1.61 km

Continued

Practice The largest diamond ever found had a size of 3106 carats. One carat is equivalent to a mass of 0.200g. Use the fact that 1 kg (1000.0g) has a weight of lb under certain conditions, and determine the weight of this diamond in pounds.

Density lab Remember: each student is supposed to turn in his / her own report.