The time in the 1,600 meter race at the school track meet is shown in the graph above. what is the average speed of the race ?

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Aproton is projected toward a fixed nucleus of charge +ze with velocity vo. initially the two particles are very far apart. when the proton is a distance r from the nucleus its velocity has decreased to 1/2vo. how far from the nucleus will the proton be when its velocity has dropped to 1/4vo?

Natural forces that can alter ecosystems include seasons and climate changes. t or f

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?