What is one advantage a primary source has over a secondary source? a. a primary source always includes several perspectives. b. a primary source combines several different accounts of an event. c. a primary source offers a firsthand account of an event. d. a primary source generally benefits from having been written after an event.

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?

Multiply or divide to make this english distance conversion. 174 inches = feet (14.5, 58, 2,088, 23)

Select all the correct answers. which three statements about electromagnetic radiation are true?