a lab exercise. Part C: Comparison of Results A student does an experiment and measures the acceleration due to gravity to be 9.73 m/s?. The textbook tells the student that the actual acceleration due to gravity at Earth's surface is 9.80 m/s. What is the student's percent error? A student is doing an experiment to measure the charge of an electron. The student determines the electron's charge to be 1.98x10-19 coulombs. The textbook tells the student that the charge of an electron is actually 1.602x10-19 coulombs. What is the percent error of the measurement? A student does an experiment to measure the electrical resistance of a piece of material. The resistance is found to be equal to 236092. The student's lab partner then measures the electrical resistance of the same material and gets a value of 2510$2 for the electrical resistance. What is the percent difference between these two measurements? Postlab Questions: 1 ) Which is more useful for measuring precision of measurements, percent difference or percent error? Explain. 2) Which is more useful for measuring accuracy of measurements, percent difference or percent error? Explain. 3) A student wants to determine the Stefan-Boltzmann constant, o. The student then measures the luminosity, surface area, and temperature of an object. The temperature of the object is changed several times. The student measures the new temperature and luminosity for each of the new cases. The surface area is assumed to be the same in each case. The data is then plotted to determine the Stefan-Boltzmann constant. The student knows that the relationship between these quantities is given by the Stefan-Boltzmann Law: L = CAT (20) How should the data be plotted so that the Stefan-Boltzmann constant can be determined? What is the slope of the line when the data is so plotted