# Cool Labs ##### Pulleys: Fixed, Movable and Systems

Students construct a complex system of six pulleys and determine its ideal mechanical advantage. They then use the system to lift a weight and measure the work input and energy output of the system. They calculate the actual mechanical advantage... ##### Conservation of Energy: Racing Marbles

A marble will roll on different paths, starting and ending at the same height. Students will predict and then measure the final velocities of the marble. Ramp A is the nearly horizontal ramp, and Ramp B dips down in the... ##### Heat Transfer Radiation

Radiant heat travels in the form of waves. No physical contact between objects is needed to transfer heat by radiation. Students will fill black, white, and silver cans with water, and observe the temperature change in the water when the... ##### Heat Transfer

Ice Melting Blocks! Heat can be transferred by conduction, convection, or radiation. In this experiment, students will discover the different rates at which materials can conduct heat. Aluminum is a better conductor of heat than high-density foam. Download Teacher Notes... ##### Popper Energy

Students will calculate the potential and kinetic energy of a popper toy using simple formulas. Potential energy is found by observing the maximum height. Kinetic energy is found by using a dynamics formula to find the popper's starting velocity. Students... ##### Pulleys, Work, and Energy

Students construct a complex system of six pulleys and determine its ideal mechanical advantage. They then use the system to lift a weight and measure the work input and energy output of the system. They calculate the actual mechanical advantage... ##### Force and Inclined Plane

Students will elevate the car in two ways: lifting directly and pulling up the ramp. They will find that it takes less force to pull the car up the ramp, but they do more work. The extra energy goes into... ##### Levers and Balance

In the first lab, students will investigate the arrangements of weights that result in equilibrium (balance) in the lever system. They will find that both the force and the distance from the fulcrum are important in evaluating the system. This... ##### Stable Mates Inquiry

We might ask why Nature chooses to arrange things according to certain patterns. In this exercise, you will be messing about with some special marbles. Let's call them "concentrically constructed dipolar spheroids" for now. Your task is to determine how...