11%) Problem 8: A person carries a plank of wood 2.0 m long with one hand pushing down on it at one end with a force F1 and the other hand holding it up at 50 cm from the end of the plank with force F2. show answer No Attempt 50% Part (a) If the plank has a mass of 19 kg and its center of gravity is at the middle of the plank, what is the force F2, in newtons?

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

Is the time in tennessee the same as florida

Give me a example of a decomposer. explain what would happen if decomposers were absent from a forest ecosystem