Ayo-yo can be thought of as a solid cylinder of mass m and radius r that has a light string wrapped around its circumference (see below). one end of the string is held fixed in space. if the cylinder falls as the string unwinds without slipping, what is the acceleration of the cylinder? (enter the magnitude. use the following as necessary: g, m, and r.)

Describe different biomes. what are some adaptations that organisms (plants or animals) must have to live in each biome?

The text compares alternating current with direct current. how are they different? a alternating current reverses direction in the electrical wiring. direct current flows in one direction only. b direct current reverses direction in the electrical wiring. alternating current flows in one direction only. c direct current is powered by solar energy. alternating current is powered by electrical energy. d alternating current does not move in the electrical wiring. direct current does move in the electrical wiring.

·sound · parallel · mechanical · not a vacuum · needs a medium · compressions and rarefaction what type of wave is being described? a) compaction b) electromagnetic c) longitudinal d) transverse