In order for the electromagnetic coil in a motor to keep turning, the current must

OA) flow through an ammeter
OB) change direction
c) periodically increase in strength
Od continue flowing in one direction

Fill in the blank. the number of each type of element in the compound (other than 1) is represented by a small number to the right of the element symbol.

Explain to someone who knows nothing about fossils the study of invertebrate paleontology and how it scientists understand the history of the earth. be sure your explanation contains a minimum of two complete sentences.

Aphysical change is a change in the size, shape,, or stafe of matter true or false