You watch a distant lady driving nails into her front porch at a regular rate of 1 stroke per second. you hear the sound of the blows exactly synchronized with the blows you see. and then you hear one more blow after you see her stop hammering. how far away is she? the speed of sound is 340 m/s.

Within a pendulum, as potential energy decreases, energy increases. a. heat b. kinetic c. frictional d. gravitational

Argon, neon, and xenon are examples of

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.