The period T of a simple pendulum is given by 
where L is the length of the pendulum and g is the acceleration due to gravity.
a. Assume 
exactly, and that L=0.742 ± 0.005 m. Estimate T, and find the uncertainty in the estimate.
b. Assume L=0.742 m exactly, and that T=1.73 ± 0.01 s. Estimate g, and find the uncertainty in the estimate.
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Wayne wants to plant 42 acres of peanuts. Hehas the field shown in Figure 9-1.
a. How many square yards are in the field?
b. Is he able to plant his crop of peanuts in the field?
c. Express the number of acres over or under using signed numbers.
Vitamin A is important in
A. Cellular metabolism B. Eyesight C. Healthy skin D. All of the above E. A and C above
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A. cast iron B. metal C. solid china D. porcelain