In this activity, pupils investigate the behaviour of carts at different speeds and with different masses. The task is fairly open-ended; pupils must discover the concept of momentum for themselves and check whether momentum is conserved during a collision of Motion+ carts
Activity Impulse conservation in a collision of Motion+ carts
Data logging
In this activity, pupils investigate the behaviour of carts at different speeds and with different masses. The task is fairly open-ended; pupils must discover the concept of momentum for themselves and check whether momentum is conserved during a collision of Motion+ carts
Activity Impulse conservation in a collision of Motion+ carts
In this activity, students investigate the nitrate content in, for example, pond or aquarium water. The nitrite formed is subsequently determined using the Griess reaction. The intensity of the color is proportional to the amount of nitrite, and thus indirectly to the original amount of nitrate. As a result, the nitrate content can be determined using a colorimeter.
Concepts learned:
- Extinction
- Spectrophotometry
- Calibration curve
- Lambert-Beer Law
Students learn to work with the gas chromatographer (BT45i) while doing this activity. They use hydrogen gas obtained from the Hofmann apparatus. This activity is easy and fast and helps students to master the BT45i so they can use the gas chromatographer for other more challenging activities. Hydrogen gas gives an easy to analyse chromatogram.
Activity Gas chromatography
In this activity students use the current and voltage sensors and investigate power delivered to a resistor by investigating the behavior of bulbs in a dc circuit.
Activity Intriguing behaviour of bulbs