A plank 4 m long is used as an incline by raising one end 1 m. A 300-N block is to be pushed up the incline. Find the force parallel to the incline plane required to push the block up. The coefficient of

friction is 0.1.

Does anyone have the answers to online physics course plato course physics, semester a v3.0

Explain what will happen if decomposers were apsent from a forest ecoysystem.

Ahair dryer is basically a duct in which a few layers of electric resistors are placed. a small fan pulls the air in and forces it through the resistors where it is heated. air enters a 1200 w hair dryer at 100 kpa and 22°c and leaves at 47°c. the cross-sectional area of the hair dryer at the exit is 60 cm2. neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.