1. CO 2 Cannon Activity Incorporates engineering design, chemistry, and physics Goals: 1.Optimize the design to produce the greatest horizontal distance 2.Minimize the time to launch Engineers call this a design optimization problem Note: Primary goal is to produce a result not discover why. Increased understanding comes as a side effect.

2. CO 2 Cannon Design Parameters Amount of water in the cannon Temperature of the water Size of the tablet (whole, half, etc.?) Tablet in one piece or crushed Angle of launch Seal of the cap

3. Effervescent Chemistry H 3 C 6 H 5 O 7 + NaHCO 3 ==> NaC 6 H 5 O 7 + H 2 O + CO 2 + Heat Citric Acid + Sodium Bicarbonate ==> Sodium Citrate + Water + Carbon dioxide + Heat

4. Projectile Physics Θ x = v 0 t cos(Θ) y = v 0 t sin(Θ) – gt 2 /2 Δr = sqrt(x 2 + y 2 )

5. CO 2 Cannon Group Discussion 1.Characteristics and benefits of Engineering Design? 2.Activities you can modify to use Engineering Design? 3.Problems you anticipate and how to resolve them? 4.Biggest roadblock to using Engineering Design?