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type of measured quantities obtained from using instruments/ equipment
fundamental quantities
Obtaining the desired/true value
accurate
Obtaining consistent readings, close to each other
precise
What fundamental quantity is measured in moles?
amount of substance
What is the unit for measuring mass?
kilograms
What term describes the minimum and maximum value an instrument can measure?
range
What term describes the values of each graduation on an instrument?
sensitivity
Alka seltzer has a dissolving time of 39.5 seconds. Upon trying, your time is 40.7 seconds. What is the percentage error?
40.7-39.5 = 1.2 / 39.5 = 0.0303797 x 100 = 3.04%
You estimate that 15 M&Ms are in the pack but only 13 were actually present. What is the percentage error?
15-13 =2 / 13 =0.1538461 x 100% = 15.38%
Which type of wave requires a medium?
mechanical
Which type of wave travels without a medium?
electromagnetic
What type of wave is sound?
mechanical
What type of wave is light?
electromagnetic
Why are shadows created?
light travels in a straight line
What are the types of shadows?
umbra and pen-umbra
Which type of medium slows down light waves the most?
solid, glass
