Now, we will learn about Velocity Time Graphs . Velocity-Time Graphs: To draw velocity time graphs, we will use the three equations of motion. Case 1: Velocity-time graphs with constant velocity (zero acceleration) When the velocity is constant, the velocity time graph, with Y-axis denoting velocity and X-axis denoting time, will be like: As clear from the graph, the velocity is constant (c) throughout the time interval.
Nikola Tesla first invented the radar because he knew the America needed help in World War I since German U boats sank hundreds of our boats. Sure it could only detect roughly 6feet out, but it was a start.
During the 1940s and 1950s, scientists began using radar on moving ships to map large areas of the ocean floor in detail. The youngest rocks are found nearest to the mid-ocean ridges. The scientists Harry Hess invented echo-sounding devices for mapping the ocean floor. As the seafloor spreads apart, hot saltwater moves upward and flows from the cracks. As the new seafloor moves away from the ridge and becomes hotter, it moves upward and forms still higher ridges.