This simple demonstration shows the interaction between electricity and magnetism. Two coils …
This simple demonstration shows the interaction between electricity and magnetism. Two coils of wire are held close to each other, but not touching. One is attached to a music source, such as a small radio or iPod, and the other is attached to an external speaker. Students can hear the music through the speaker even though there is no direct connection. At the end of this activity the students will understand there is a relationship between the electric and magnetic fields. Specifically, they will verify that a magnetic field is created in a current carrying coil of wire and a changing magnetic field can induce a current in another coil of wire.
In this activity, students are presented with two objects (typically cars) that …
In this activity, students are presented with two objects (typically cars) that have different constant speeds and that will race each other. The students must determine which object will win the race, as well as how much time elapses between the objects crossing the finish line. Not all of the characteristics of the situation are given to the students immediately; they must take and record some data to determine the answer. The activity is flexible in that the amount of information provided can be varied by the instructor according to how much data collection she or he would like the students to do. It is also flexible in that it can be done in a variety of settings and the procedures can be adjusted according to the setting and number of students.
In this lesson, students interactively create predictions of position, velocity and acceleration …
In this lesson, students interactively create predictions of position, velocity and acceleration graphs on the web using java applets. The applets automatically classify student answers, so instructors can create graphs of student predictions. Students also write text explaining why they think the graphs will have the shape they do.
This is a discrepant event demonstration that can be used to help …
This is a discrepant event demonstration that can be used to help students begin to understand some applications of Newton's Third law of motion. In this activity, students are asked to predict what would happen if you were sitting on a low friction cart and threw a heavy medicine ball off the back. Students will apply knowledge learned from this demonstration to help them understand basic rocket propulsion.
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