Changes in Air Pressure with Altitude Altitude above sea level (m) Air pressure(Bars) Air Pressure(kPa) 0 1.000 200 0.9971 400 96.68 600 94.42 800 0.9103 92.21 1000 0.8888 1200 0.8677 87.89 fill the chart

15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.