Name:___________________________ Section:__Online___ Date: _____________

Exercise 1: Determine the number of significant figures for each number and then write the number in scientific notation.

Number	Number of Significant Figures	Scientific Notation
10.005
6.80
.066
1009.005
186,000
1.2
0.009

Perform the following calculations.

Problem	Calculator Result	Result with Proper Number of S.F.	Scientific Notation
5.003 + 4.1 =
141.0 + 11.31 =
0.005 + 4.10 =
1,300,000 x 2.501 =
1503.4 x 131.0 =
(1.2 x 10^3)(3 x 10^5) =
=
(12.3)^5 =

Name:___________________________ Section:__Online___ Date: _____________

Exercise 2: Pendulum Experiment

A simple pendulum will be used to experimentally determine g. By measuring the pendulum’s length (L) in meters and the period of oscillation (T) in seconds we can use the following formula to find g.

(π = 3.1416)

Procedure: Record all measurements with the proper number of significant figures. Construct a simple pendulum from a string and any convenient weight. Measure the length (L) of the pendulum using a meter stick. Anchor the top of the pendulum securely. Displace the pendulum bob a small amount and release. Time 15 complete oscillations of the pendulum (one complete oscillation is from the release point to when the pendulum bob comes back to the release point the next time). Record this value in the Data Table and then repeat this

procedure 4 additional times. Calculate 5 values of g using the 5 periods and L.

Calculations (show your work!)

1. Find the mean value of g for your data.

2. Find the mean absolute deviation for your data.

3. What is the accuracy of your measured value of g?