1. Use the circuit below to answer the following questions. (7 marks)
(a) What is the potential difference across R1?

Which describe reflection? check all that apply. light bounces off a boundary.

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?

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