Measurements and Units

Hi! I'm back! Today, we would be learning a new lesson--Measurements and Units. In today's lesson, you would learning the importance of units, and what are some of the measurements instruments and precautions to take.

Measurements Instruments includes:
-ruler ( accurate to 0.1cm)
-measurements tapes
-engineer's caliper
-vernier caliper (accurate to 0.01cm)
-micrometer screw gauge (accurate to 0.01cm)
-and many more....

Precautions to take when using a ruler.:
-avoid parallax errors by putting your eyes at the same level as the markings of the scale
-eye should be put perpendicularly at the mark of the scale

Precautions to take when using a vernier caliper:
-Make sure the instrument is clean and make sure it works ( no forced friction between vernier scale and main scale)
-Check for Zero error( error resulting in the wrong collaboration of the instrument)

Precautions to take when using micrometer screw gauge:
-Never tighten the screw too much
-Check for zero errors
-Make sure it is clean at the ends of anvil and spindle before the experiment

Now, units is very important. Using the wrong units may result in fatal accident like the flight 143. The ground did not put enough fuel on the plane. Fortunately, no one died. What had caused the problem? The metric changeover in Canada should have been by further education on the airline's part. The ''conversion factor'' of 1.77 was actually the fuel's density in pounds per liter, not kilograms. The fuel's density kilograms per liter is 0.803.