They say their research shows, for the first time, that caffeine, catechols, and chemical-substances called N-alkanoly-5-hydroxtryptamides stimulate molecular mechanisms of stomach acid secretion in human stomach cells.
Page 1 of 7. Specific Heat. Objectives. In this lab you will. â¢ measure the specific heats of aluminum and lead using a calorimeter and the. Vernier Temperature Sensor. â¢ observe how the temperature of your system reaches equilibrium in real time. â¢ plot your data and analyze it using the Vernier Logger Proâ¢ software.
You measure the dimensions of the block and its displacement in a container of a known volume of water. You calculate the density of the block of aluminum to be 2.68 g/cm 3. You look up the density of a block aluminum at room temperature and find it to be 2.70 g/cm 3. Calculate the percent error of your measurement.1  Subtract one value from the other: 2  2.68 - 2.70 = -0.02. 3  Depending on what you need, you may discard any negative sign (take the absolute value): 0.02. 4  This is the error.ou look up the density of a block aluminum at room temperature and find it to be 2.70 g/cm 3. Calculate the percent error of your measurement. 1  Subtract one value from the other: 2  2.68 - 2.70 = -0.02. 3  Depending on what you need, you may discard any negative sign (take the absolute value): 0.02. 4  This is the error.