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Two cars, starting from rest at x=0 at t=0, are racing. Car A and B both accelerate in a straight line at a constant acceleration (a=4m/s2) for 10s. After 10s Car A stops accelerating (acceleration is 0m/s2), but Car B continues to accelerate at the same rate (a=4m/s2).
After 20s, Car B crosses the finish line. How far is the finish line from the starting point of the race?
D=_______________
How far behind is Car A when Car B crosses the finish line?
At every point on the surface of a sphere of radius 0.4 m the electric field is radially outward, with a magnitude of 20 N/C
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What must the constant acceleration of the car be after the brakes are applied so that the car would come to rest at the stop sign.
When two identical ions are separated by a distance of 8.3×10?10m , the electrostatic force each exerts on the other is 5.4×10?9N How many electrons are missing from each ion
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