Define the following terms: a) weedicides. b) animal husbandry. c) manure. d) irrigation.

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

How many molecules are present in 3 mols of silicon dioxide (sio2)?

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?