Read the sentence. telescopes or satellites that neither mercury nor venus a moon. which pair of verb forms correctly completes the sentence? proves; has proves; have prove; have prove; has

Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work

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

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?