If you hear a beat frequency of three beats per second when you try to tune a piano string to the frequency of 466 Hz, what frequencies could the piano string be giving off? A. 463 Hz or 466 Hz

B. 469 Hz or 472 Hz

C. 463 Hz or 469 Hz

D. 460 Hz or 463 Hz

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

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created or , but it can be

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?