These are factors that affect the sensitivity of a balance, except Select one: a. User error b. Proper grounding c. Cluttered workplace d. Air currents The error that result when one fails to account for the meniscus properly by reading it from above or below its true bottom is known as Select one: a. Error of parallax b. Volumetric error c. Meniscus error The USP states that a deviation of plus or minus 1 mm in the meniscus reading causes an error of approximately 0.5 mL when

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5.a Please answer the following with a clear, readable and correct solution.

Post-Lab Homework Problems. 1. A student is using a track photogate to determine the time it takes her to run 50 meters. She records the following times: Trial Time (seconds) 1 5.420 5.464 3 5.728 4 5.496 5 5.644 6. 5.794 7 5.540 The data she collects has a mean of 5.583714 seconds, with an absolute uncertainty computed to be 0.141074 seconds. Report her 50-meter time as a confidence interval (a) using the mean and the absolute uncertainty given above. Another student measures his 200-meter run time (b) to be 20.7 + 0.3 seconds. Report the relative uncertainty of each student and identify which has the more precise run time.

7. Differentiate the following functions to review unit 3. f(x) = sin(7 In(x)) a. b. d. f'(x) = f'(x) = f'(x) = F'(t) = f(x) = √√/In x f(x) = sin(x) In(9x) F(t) = In (3t+1)³ (4t 1)4.