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Chapter 1. Branches of Physics What do these have in common? Odd one out???

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Presentation on theme: "Chapter 1. Branches of Physics What do these have in common? Odd one out???"— Presentation transcript:

1 Chapter 1

2 Branches of Physics

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

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

5 CONVERT 1 kg = 2.20462262 pounds 1 meter = 3.2808399 feet 1 s = 1 s

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

7

8 Convert, use Scientific Notation

9 Examples

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13 Practice 1 2.5 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 _______________________________________ 1.753 x 10 -13 s to ps _________________________________________

14 Precision & Sig. Dig.

15 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.

16 SIG FIGS MADE SIMPLE

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18 Sig. Fig. 100 000 100. 00 202 000 0.0050 340 505 0.00505

19 Practice The value of the speed of light is now known to be 2.997 924 58 ×10 8 m/s.Express the speed of light in the following ways: a) 3 SF b) 5 SF c) 7 SF

20 How many Sig.Figs? 300 000 000 m/s 3.00 ×10 8 m/s 25.030 °C 0.006 070°C 1.004 J 1.305 20 MHz

21 Adding and Subtracting # of digits 0.______ (after the decimal point) = the least precise 3345.28 + 0.2 = 3345.48 = 3345.5 57.8 – 0.567 = 52.233 = 52.2

22 A QUICK SELF-CHECK  0.0845 kg ___________  37.00 h _____________  8630000.000 mi _____  0.000 000 0217 g ____  750 in ______  0.5003 s ______

23 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) 23967 / 45 = 532.6 = 5.3  10 2

24 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

25 Continued

26 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 2.205 lb under certain conditions, and determine the weight of this diamond in pounds.

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

28 Reading and Plotting Graphs positiontime 15 m2.5 s 30 m5 s 45 m7.5 s 60 m10 s

29 Reading and Plotting Graphs positiontime 2m1 s 8 m2 s 18 m3 s 32 m4 s 50 m5 s 72 m6 s

30 Reading and Plotting Graphs


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