Instruction Manual Manual No. 012-08780A Mechanical Equivalent of Heat Tube Model No.
Equivalent of Heat Tube Model No. ET-8781 Table of Contents Equipment List........................................................... 3 Introduction ............................................................. 4 Theory ................................................................... 4 Equipment Setup ........................................................ 5 Suggested Experiment .................................................. 6 Sample Data/Results....................................................
Model No. ET-8781 Mechanical Equivalent of Heat Tube Mechanical Equivalent of Heat Tube Model No. ET-8781 Equipment List 3 1 2 4 Included Equipment Replacement Model Number* 1. Mechanical Equivalent of Heat Tube(1) ET-8781 2. Fast Response Thermistor Probe (1 built-in probe) PS-2517 3. Metal Balls (120 balls) 699-043 4. Velcro® Strip 616-153 *Use Replacement Model Numbers to expedite replacement orders.
Mechanical Equivalent of Heat Tube Model No. ET-8781 Introduction PASCO’s Mechanical Equivalent of Heat Tube (ET-8781) is used for demonstrating changes in gravitational energy to thermal energy. While the energy conversion is occurring, students can measure and observe the temperature change in real-time in a DataStudio display. As the tube is turned over, the steel balls fall the length of the tube and strike the thin, metal plate at one end.
Model No. ET-8781 Mechanical Equivalent of Heat Tube Thermal Energy When the balls strike the aluminum plate, their kinetic energy is converted into thermal energy, increasing the temperature of the plate and the balls. For a single object, Q=mc ∆T, but since the balls and the plate have different specific heats, we need to account for each. Also, there are two identical plates. You cannot remove the bottom plate. It is assumed that ∆T is the same for all of the objects.
Mechanical Equivalent of Heat Tube Model No. ET-8781 Suggested Experiment Exploring Energy Changes During the Rotation of a Heating Tube Equipment required: Mechanical Equivalent of Heat Tube (ET-8781), DataStudio software, computer interface (PASPORT or ScienceWorkshop), Temperature Sensor Note: The Heat Tube must be used with a Temperature Sensor that accepts a stereo plug input (i.e. PS-2125 Temperature Sensor, PS-2143 Quad Temp. Sensor, PS-2146 Absolute Pressure/ Temp.
Model No. ET-8781 Mechanical Equivalent of Heat Tube 11. Calculate the percentage of energy turned into heat using %=Q/PE x 100(%) . 12. Where did most of the energy go? 13. Repeat steps 3-12 with twice the number of balls and one-half the number of balls. 14. How does the temperature and potential energy (PE=mgh) change when you change the number of balls? Why? Explain your results.
Mechanical Equivalent of Heat Tube Model No. ET-8781 Appendix A: Technical Support For assistance with the ET-8781 Mechanical Equivalent of Heat Tube or any other PASCO products, contact PASCO as follows: Address: PASCO scientific 10101 Foothills Blvd. Roseville, CA 95747-7100 Phone: (916) 786-3800 FAX: (916) 786-3292 Web: www.pasco.com Email: techsupp@pasco.
