1. Calibration of measuring instruments are sometimes done using gauge blocks. What environmental issues can affect the accuracy of the gauge blocks?

2. How large an expansion gap should be left between steel railroad rails if they may reach a maximum temperature 35.0^oC greater than when they were laid? Their original length is 10.0 m.

3. The gauge pressure in your car tires is 40 psi at a temperature of 90^oF when you drive it onto a ferry boat to Alaska. What is their gauge pressure later, when their temperature has dropped to -20^oF ?

4. What is the escape velocity from earth? What is the final velocity of an object falling to the center of the earth without air resistance?

5. On a certain day, the temperature is 90^oF and the relative humidity is 90.0%. How many grams of water must condense out of each cubic meter of air if the temperature falls to 40^oF ? Such a drop in temperature can, thus, produce heavy dew or fog.

6-7. If you want to cook in water at 150^oC , you need a pressure cooker that can withstand the necessary pressure. What pressure is required for the boiling point of water to be this high? If the lid of the pressure cooker is a disk 25.0 cm in diameter, what force must it be able to withstand at this pressure? Use 1 atm as the countering pressure down.

8.If a car tire of radius 18 inches travels 100 miles, how many revolutions does it have to make?

9. If a 15 inch diameter wheel is used to hoist a bucket 150 feet up out of a well, how many times will the wheel be rotated?

10. A 32 inch diameter wheel turning at 30 RPM will go how far in 25 seconds?

11-12. A grinding wheel turns at 10000 RPM, with a new wheel the diameter is 5inch. What is the surface speed of the wheel edge? What diameter of worn wheel will have 2/3 of the new wheel surface speed?

13. If a spindle rotates at 4500 RPM, a 3 inch diameter shaft has a surface speed of what value?

14. Is air considered a fluid?

15. Are liquids compressible?