Part A fa vehicle is of lengh45 m on the avernge, what is the average spacing betwoen vehicles at the above traffie density? Express your anewer uing two signifcant igures AZ4 + * O ? Submit Reet Aneer • Part Collsion avoidarce automated control systems, which operate by bouncing rader or sonar signals of suounding vehicles and then accelerate or brake the car when necessary, could greatly reduce the required spacing between vehicles. he average spacing isa distance3m. how many vehicles per hour can a lane of ate cary peed 7 km/h? Express your anewer using twe signifcant figures. vehile Submit Resuest Anwer

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Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.