1. Lay the string on the floor or on a table and tie one end of the string to an unmoving object (ex. chair leg) or have someone hold it still.
2. You manipulate the other end. Move it left and right to create a transverse wave flat on the surface you are using,
or, move it up and down to create a standing wave.
3. Change the amplitude (height) of the wave (make your arm motions larger). What seems to happen to
the frequency of the wave?
the wavelength of the wave?
the velocity (speed) of the wave?
4. Now hold your arm very stiff and create your waves. Observe.
5. Next, make your arm very floppy. How does the floppy vs. stiff arm wave differ?
Your arm (stiff or floppy) represents the medium (material the wave is
traveling through). The wave should travel faster when your arm is stiffer.
Lab: Finding Patterns in a Wave

All phase changes are .an example of a phase change is an ice cube melting

Which of the following describe possible scenarios? a) an object has zero instantaneous velocity and non-zero acceleration. b) an object has negative acceleration and is speeding up. c) an object has positive acceleration and constant velocity. d) an object has positive velocity and zero acceleration. e) an object has increasing positive position and negative velocity. f) an object has decreasing positive position and negative acceleration.

Amajor impediment to wide acceptance of electric vehicles even on the part of people who use their cars almost exclusively for commuting is the inability to use their electric vehicles for occasional extended trips. in an attempt to make purchasing electric vehicles more attractive to commuters, one electric vehicle producer is planning to offer customers three days free rental of a conventional car for every 1,000 miles that they drive their electric vehicle. which of the following, if true, most threatens the plan's prospects for success? (a) many electric vehicles that are used for commercial purposes are not needed for extended trips. (b) because a majority of commuters drive at least 100 miles a week, the cost to the producer of making good the offer would add considerably to the already high price of electric vehicles. (c) the relatively long time it takes to recharge the battery of an electric vehicle can easily be fitted into the regular patterns of car use characteristic of commuters. (d) although electric vehicles are essentially emission-free in actual use, generating the electricity necessary for charging an electric vehicle's battery can burden the environment. (e) some family vehicles are used primarily not for commuting but for making short local trips, such as to do errands.