Consider two antennas radiating 6.0-MHz radio waves inphase with each other. They are located at points S1 and S2,separated by a distance d = 175 m, Fig. 34-30. Determinethe points on the y axis where the signals from the twosources w ill be out of phase (crests of one meet troughs ofthe other). FIGURE 34-30 56.
Lectures 8 nd Dynamics KINEMATICS describes “how” things move, DYNAMICS describes “why” things move Unbalanced Force causes motion to c hange (Δv ) Force → a physical uantity escribing how hard and in what direction acceleration is moving (push or pull) Requires an agent a nd object Is a vector Contact Force Physically touches o bject The agent is exactly what is in contact with the object Long Range Force Not touching (gravity is the only one