1) Select one entry for each blank from the corresponding four choices.

1.____ errors may be avoided by ensuring that the tools that are used in the experiment are properly calibrated.

2. ____ errors can be minimized by conducting many trials.

A) 1. standard 2. systematic

B) 1.Random 2. Personal

C) 1. Random 2. Systematic

D) 1. Systematic 2. Random

2) A series of four measurements of g are made in the physics lab. The results of these measurements in m/s^2 are: 9.63, 9.58, 9.71 ,9.68

The average of these four measurement is the experiential value of g and the accepted value is 9.80 m/s^2

What is the perfect error of these measurements?

-0.15%

-1.56%

-1.53%

-0.76%