Is it possible to tell which thermometer is more precise?

1.  The boiling point of water is measured four times. The results are 110.01°C, 110.02°C, 109.99°C, and 110.01°C. Which of the following statements best describes this measuring process?

b.  Accurate but not precise

c.    Precise but not accurate

d.   Neither accurate nor precise

e.  Both accurate and precise

 

2.   Two thermometers are calibrated by measuring the freezing point of glacial acetic acid, which is 16.6°C. Equal numbers of measurements are taken with each thermometer. The result from the first thermometer is 16.4 ± 0.2°C and the result from the second thermometer is 16.8 ± 0.1°C.

 

a.   Is it possible to tell which thermometer is more accurate? If so, say which one. If not, explain why.

b.  Is it possible to tell which thermometer is more precise? If so, say which one. If not, explain why.

 

3.   The weight of an object is given as 67.2 ± 0.3 g. True or false:

a.  The weight was measured to be 67.2 g.

b.  The true weight of the object is 67.2 g.

c.   The bias in the measurement is 0.3 g.

d.   The uncertainty in the measurement is 0.3 g.

 

find the cost of your paper

Determine the outlet concentration x1 in the water solution and in the trichloroethane solution using an analytical equation.

Predicting Extraction for an Existing Tower with a Given Number of Steps. An existing tower contains 5.0 theoretical steps. It is desired to predict its performance under the following conditions….

Calculate the minimum solvent that can be used. [Hint: In this case, the tie line through the feed L0 represents the condition for minimum solvent flow rate.

Minimum Solvent and Countercurrent Extraction of Acetone. An aqueous feed solution of 1000 kg/h containing 23.5 wt % acetone and 76.5 wt % water is being extracted in a countercurrent….

Determine the break-point time, the fraction of total capacity used up to the break point, the length of the unused bed, and the saturation loading capacity of the solid.

Drying of Nitrogen and Scale-Up of a Column. Using molecular sieves, water vapor was removed from nitrogen gas in a packed bed (C1) at 28.3°C. The column height was 0.268….