Oersted found the direction of the magnetic field around a wire carrying current by placing a (fill in the blank) in many places
around the wire.

The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve