Partial Vacuum P-53
Contents
1. questions 1 Explain what happens to the balloon and the marshmallow when you pumped out the air from the box 2 What happens to an exposed human in space How is it connected to this experiment 3 What would happen to a balloon filled with helium inside a container with atmospheric pressure What would happen to it in a vacuum 4 Write two applications for a partial vacuum in everyday life Experiment P 53 Partial Vacuum Ver 3 0 12. 1 NeuLog EJ Experiment P 53 Partial Vacuum amp Objectives To study the concept of vacuum and partial vacuum To investigate how pumping out air from a box affect the pressure inside To investigate how the change of pressure affects a balloon and a marshmallow that are in the box Modules and Sensors PC NeuLog application USB 200 module BAT 200 battery module Two RF 200 RF communication modules NUL 210 Pressure logger sensor Equipment and Accessories Vacuum box Vacuum pump Balloon The items above are included in the NeuLog Environmental chamber kit HUM KIT Materials Marshmallow Experiment P 53 Partial Vacuum Ver 3 0 1 2 NeuLog EJ Introduction Pressure is a force exerted by a substance per unit area on another substance The pressure of a gas is the force exerted on the walls of a container by the gas inside it In everyday usage vacuum is a volume of space empty of matter and its gaseous pressure is much lower than the atmospheric pressure The word comes from the Latin term for empty Vaccus It is impossible to achieve a perfect vacuum one with no particles at all A partial vacuum is defined as an enclosed space from which part of the air or another gas has been removed In this experiment we will pump out air out of a box in order to create a partial vacuum We will measure the pressure inside during this process We will also investigate how the low pressure affects a balloo
3. n Select the kPa button to set the sensor s mode Pressure id 1 tt 15 Click on the Experiment Setup icon and set the Experiment duration to 10 seconds sampling rate to 20 per second Experiment P 53 Partial Vacuum Ver 3 0 1 6 NeuLog ix Testing and measurements 16 17 18 19 20 21 22 Click on the Run Experiment icon a to start the measurement Take the vacuum pump and place it above the valve of the Dox Pump the air out of the box at least 15 times and watch what happens to the balloon during the process In order to focus on the desired range click on the Zoom icon Q locate the mouse cursor at a point above the graph and press its left button keep it pressed and create a rectangle that includes the whole range Alternatively click on the Zoom fit icon Ea Your graph should be similar to the following te E D T Erase Single Run Save Open Experiment Step Experiment Experiment Experiment Raabs ee BB BBs oom Zoom Zoom Select Line ow Grid Graph Table Point Area Fit Zone Width Functions Save your graph We can see that every time some air is pumped out of the box the pressure decreases At one point it gets harder to Experiment P 53 Partial Vacuum Ver 3 0 1 7 NeuLog EJ pump more air out and the pressure does not decrease anymore Challenge research 23 Repeat the experiment but this time use a marshmallow instead of the balloon Summary
4. n or a marshmallow inside the box Experiment P 53 Partial Vacuum Ver 3 0 1 3 NeuLog EZ Procedure Experiment setup 1 Set up the experiment as shown in the picture below NeuLog EZ Computer 2 Inflate the balloon a little and tie a knot at its end 3 Place it inside the vacuum box Experiment P 53 Partial Vacuum Ver 3 0 1 4 NeuLog EJ 4 Connect a charged battery module to an RF module and a pressure sensor 5 Place the connected modules and sensors in the vacuum box 6 Close the box 7 Connect the other RF module to a USB module Sensor setup 8 Connect the USB 200 module va to the PC Note The following software functions are explained in short It is recommended to practice the NeuLog application functions as described in the user manual beforehand 9 Run the NeuLog application and check that the pressure sensor is identified 10 Ifthe sensor is not identified make sure that the battery is charged the led will turn on when pressing on its button Also make sure that the RF modules have the same ID number In order to change their ID number look at the RF module user guide in the NeuLog website Experiment P 53 Partial Vacuum Ver 3 0 1 5 NeuLog EZ Settings 11 12 13 14 pur Click on the On line Experiment icon in the NeuLog main icon bar Click on the pressure sensor s module box Click on the Range butto
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