Question

Analysis questions part 1 and part 2.

Data and Calculations- Length, Mass, Volume, Density and Time Part 1: Estimating Various Measurements Table 1 Estimated Actual % Difference 1.00 m 15 m 93.33% Length (m) Time (s) Mass (g) Part 2: Measurements Using Various Instruments Note: As always, be sure to record to the precision each device is capable of. Measurement of your hand span: 16 cm First Object Measured: eScience Lab Box Table 2 Length Width Height Volume 2.00 hands long 1.33 hands long 1.00 hand long Hands Hand (em) Ruler (em) Meter Tape (en) 21.28 cm 23.30 cm 23.50 cm 15.50 cm 273 cm Second Object Measured: Box of Kleenex Table 3 Width 125 hands long 75 hand long Length Height Volume 50 hands long 8.00 cm 9.20 em Hands Hand (em 20.00 cm cm Ruler (cm) 22.50 cm cm Meter Tape (cm) [22.30 cm Third Object Measured: Cheez It Box Table 4 Length Width Height Volume 1.00 hand long 40 hand long 1.33 hands long Hands Hand (cm) Ruler (cm) Meter Tape (cm) 16.00 cm cm 6.20 cm

Answer 1

(A) The percent difference found in the measurement f length in 1400% and not 93.33% as given, this is a large difference Mistakes may be either in making estimates or in making measurement Difference is high in all the measurement f length time & mass (B) Accuracy in estimation f physical quantities is important for the purpose of making comparison f two objects, where measurement is a long process or difficult process we can not add salt to our food every time by measuring amount f salt by sensitive instrument (c) puts buttons on sour dresser the locates the place where to put buttons just by making estimates. we take amount f food Items like rice, pulse etc on our plate, by estimates and not b after measuring then on sensitive adjustment. (A) for volume be hands for hand measurement and c.m^3 for measurement in c.m. (B) while purchasing lead-sheet from the market for our bed measurement by hand f its length and breadth