Conservation Of Energy Through Kinetic And Thermal Interactions

Dr. Brian Thomas demonstrates the principle of conservation of energy through three engaging experiments. The first involves colliding steel spheres to show kinetic energy converting to thermal energy, burning paper. The second uses a temperature probe and silly putty to illustrate temperature rise from kinetic energy. The final demo features a fire syringe, demonstrating gas compression and ignition of cotton fibers. These experiments visually and effectively teach energy conversion concepts.

What principle is being demonstrated with the colliding steel spheres?

• Conservation of energy

• Conservation of mass

• Conservation of charge

• Conservation of momentum

What happens to the paper when the steel spheres collide?

• It burns

• It changes color

• It remains unchanged

• It gets torn

What is used to measure the temperature change in the silly putty demo?

• A voltmeter

• A barometer

• A temperature probe

• A thermometer

What is the initial temperature of the silly putty before the hammer strike?

• 19.8 degrees C

• 18.3 degrees C

• 17.5 degrees C

• 20.0 degrees C

What is the purpose of the fire syringe demo?

• To measure air pressure

• To illustrate sound waves

• To demonstrate kinetic energy conversion to thermal energy

• To show how gases expand

What material is used inside the fire syringe to demonstrate ignition?

• Paper strips

• Cotton fibers

• Wood shavings

• Plastic beads

What concept is highlighted with the fire syringe demo for advanced students?

• Thermodynamics of gas expansion

• Thermodynamics of liquid cooling

• Thermodynamics of gas compression

• Thermodynamics of solid melting

What should be ensured for the fire syringe to work effectively?

• The syringe is cold

• The cotton is wet

• The seal is tight

• The piston is loose

What is a key factor in ensuring the cotton ignites in the fire syringe?

• Using a colored piece of cotton

• Using a large piece of cotton

• Using a small piece of cotton with a lot of surface area

• Using a wet piece of cotton

What might be necessary to achieve a successful result with the fire syringe?

• Cooling the syringe first

• Using a different gas

• Trying multiple times

• Heating the syringe first