For the Ball Drop 2 experiment, observe the graph of the vertical displacement of the small ball against time (y vs. t). What can you say about the vertical displacement of the small ball? What graph shape is this? What does this shape tell you about the mathematical relationship between y and t? Now check your hypothesis by investigating two Tracker videos: Ball Drop and Large Ball Drop.

Open the Tracker experiment: Ball Drop . Watch the movie by clicking on the green play button. (The other video controls allow you to “rewind” the video or step forward or backward one frame at a time.). Watch the video to go ahead with the activity.

Now, keep the Ball Drop video open, and also open the Tracker experiment Large Ball Drop and watch that video.

Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n

This is the substance(s) formed in a chemical reaction.

Antireflective coatings on solar cells are often made by applying a thin film of silicon nitride (sinx), which has an index of refractive of 1.2, on the top of the silicon solar cell, which has a refractive index of about 3.5. however, the sun emits radiation of various wavelengths which the solar cell absorbs, and the antireflective coating can only absolutely minimize the reflection of one of these wavelengths. the coating thickness is chosen to reduce the reflection of green/yellow light (e = 2.2 ev), which is the most intense color in the solar spectrum (shown below). which of the following coatings would minimize reflection of green/yellow light? the answer is 820 nm how? what is the angular width of the central maximum of an electron traveling at 2 x 108 m/s going through a single slit of width 1 mm.