The brain can retain the impression of the image of an object for 1/20of a second even when the image is no longer in front of the eyes . plz tell me whether it is true or false
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The rocket is fired vertically and tracked by the radar station shown. when θ reaches 66°, other corresponding measurements give the values r = 32700 ft, r¨ = 85 ft/sec2, and θ˙ = 0.019 rad/sec. calculate the magnitudes of the velocity and acceleration of the rocket at this position.

The force it would take to accelerate an 900-kg car at the rate of 6m/s2

How can you measure the amplitude of a longitudinal wave?