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.
The first modern U.S. radar was invented and developed at NRL in 1922. By 1939 NRL installed the first operational radar aboard the USS New York, in time for radar to contribute to naval victories of the Coral Sea, Midway and Guadalcanal.NRL then further developed over-the-horizon radar as well as radar data displays.RL has a long history of contributions to materials science, dating back to the use of Industrial radiography with gamma rays for the nondestructive inspection of metal casings and welds on Navy vessels beginning in the 1920s.