Page 22 - Demo

1-800-452-1261 FLINNSCI.COM
CONSERVATION OF ENERGY
Bowling Ball Pendulum— Demonstration Kit
Demonstrate the conservation of energy with a real classic! Hold a heavy bowling ball pendulum against the tip of your nose. Release the bowling ball without moving your head, and allow it to swing through its pendulum arc. The students’ shock and fear will be very apparent as the heavy, fast- moving bowling ball makes its return trip toward your head. To the amazement of the students, the bowling ball only gracefully touches the tip of your nose—dramatically showing the law of conservation of energy.
AP6839 I $38.85
Radiation Can Set
Dark surfaces absorb radiation more than light ones. Here’s an easy experiment to prove it. Just fill the two cans in this kit with room temperature water. Put thermometers in the holes in the tops, and heat the cans equally with an infrared lamp. The differ- ence in temperature rate increase will be dramatic. Except for their finish, these two cans are identical. One has a bright silver metallic finish, and the other is coated in dull black. The screw top makes water addi- tion and removal convenient.
AP5960 I $18.55
FLINN SCIENTIFIC I CONSERVATION OF ENERGY
Conduction, Convection and Radiation—Activity-Stations Kit
Discover the basic principles of heat transfer with four hands-on experiments:
• Test the thermal conductivity of materials and compare results with known quantities.
• Investigate how temperature affects the density of a liquid, and watch as convec- tion currents are created.
• Observe the dramatic effects of convec- tion currents in air on a lighted candle.
• Explore heat transfer through radiation by measuring the temperature increases for two types of sand exposed to heat.
AP7183 I $76.85
Convection of Liquids Tube
Dramatically demonstrate the motion caused by the convection in a liquid. Fill this glass apparatus with water, then introduce
a dye at the top. Heat one of the lower corners, and watch as the dye follows the path of the convection current. Apparatus is glass and measures 15 x 20 cm. Food dye is available separately. Includes demonstration instructions, detailed discussion and a repro- ducible student worksheet.
AP6053 I $34.60
Kinetic Energy Ball Drop— Demonstration Kit
Will a ball traveling twice as fast as another ball of the same mass really have four times the kinetic energy? Demonstrate the relationship between speed and kinetic energy by dropping a ball from two differ- ent heights onto a bed of soft clay. For
the second drop, the ball is traveling twice as fast, and it forms a crater four times as deep, indicating that the energy is propor- tional to the square of the ball’s speed. After the demonstration, the clay can be removed from the mold and then cut in half along
the crater marks to measure and compare the depth of the craters. All the materials are completely reusable. Detailed instruc- tions, historical background information and student worksheet are provided.
AP7187 I $21.00
Collision in Two Dimensions
Study the conservation of momentum and energy in collisions. The Collision in Two Dimensions apparatus works by holding a steel ball at the top of a curved aluminum track. When the ball is released, it travels down the track and collides with another ball placed on an adjustable target support. Students then observe how the two balls fall. Includes track, two steel balls, a hollow wooden ball and instructions.
AP9165 I $25.85
20