Discussion Topic
A system is a group of parts that can be
considered one unit. Storm systems,
ecosystems, and our bodies are natural systems.
Cars and houses are human-made systems.
Choose an example of a system, and analyze
the energy flow through the system. Describe in
detail how energy enters the system, how energy
changes form while in the system, and how
energy leaves the system.

The slotted link is pinned at o, and as a result of rotation it drives the peg p along the horizontal guide. compute the magnitude of the velocity and acceleration of p along the horizontal guide. compute the magnitudes of the velocity and acceleration of p as a function of θ if θ=(3t) rad, where t is measured in seconds.

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?

Abar magnet cut in half will form a total ofpoles. a)fourb)eightc)two