I need help with part 3 and 4 only Activity Measuring the Density of Liquid Nitr

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I need help with part 3 and 4 only

Activity Measuring the Density of Liquid Nitrogen You used Archimedes's principle to find the volume of a solid object, using a liquid with a known density. Now you will use a cylinder of known volume to find the density of a liquid. You will use the same method as you did above, but with liquid nitrogen instead of water. Caution: The liquid nitrogen will be at its boiling point, -195.8°C (-322°F). Be careful how you handle the liquid nitrogen. Exposure with your skin could result in daage Make sure the metal cylinder is completely dry before immersing in the liquid nitrogen. Lower the aluminum into the liquid nitrogen. The nitrogen will boil violently, making it impossible to get an accurate reading. Wait for the nitrogen to calm down. You may need to get more nitrogen to cover the cylinder. For the volume of the cylinder, use your best value from Activity I. Postlab Questions 1. Which of the three methods you used to find the volume of the aluminum would you expect is the 2. What is a benefit and downside to each of the three methods used in Activity I? Think about 3. Why is it important to make certain that no water adheres to objects during the submerged 4. In Activity II, the aluminum probably changes volume. Because it is so cold, the aluminum will most accurate? Explain why. Which one was most accurate in your experiment? precision of each measurement. The number of digits can be a partial indication to the precision of an instrument. weighing procedure of Activity I1? If ice were present, what would happen to the tension? How would this affect you result for density (higher or lower)? (The density of ice is 0.9167/mL) contract a little bit. Would this make your value of the density of liquid nitrogen be too small or too large? Hint Is the value you use for V in your calculations too large or too small?

Explanation / Answer

3}if water is present while submerging in container as water is incompressible , there will be no any effect of it on container but it will be in frozen state may affect density measurement.it will be higher the density of Nitrogen.,as density of liquid nitrogen is lower then ice say 808.5 kg/m 3 lower than ice.

4} if alluminium contracts while submerged volume will decrease so weight will also be decreased.,it will affect the value too small.

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