The cross-section of a pipe has an area of 2.0 cm2. calculate the flow rate (in grams per second) of a liquid with p=1.0 g/cm3 through the pipe if the flow speed is 42 cm/s. a. 46 g/s c. 80 g/s b. 76 g/s d. 84 g/s

Idon’t quite understand this problem

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?

Your town is considering building a biodiesel power plant describe at least two advantages and two disadvantages