Which of the following is an example of a lever? knife ramp pencil sharpener wheelbarrow

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx hurrim timed

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories