An object is placed 5.5 cm in front of a thin converging lens, and its image forms
12 cm from the lens on the same side as the object. What is the focal length of
the lens? A) 8.6 B)10 C)6.2. D)-8.6

If a star is moving toward earth, it is

A6.0-kilogram cart initially traveling at 4.0 meters per second east accelerates uniformly at 0.50 meter per second squared east for 3.0 seconds. what is the speed of the cart at the end of this 3.0 second interval? (1) 1.5 m/s (3) 3.0 m/s (2) 5.5 m/s (4) 7.0 m/s

Ivana walks 2km north then turns around and walks 3km south