I need help asap. Thankyou in advance

I. Convert the following. Show all necessary solutions. 1. 67 miles = cm(centimeter) 2. 34ft Km(Kilometer) 3. 50 yards = mm(millimeter) 4. 100 ,000m = nm(nanometer) 5. 10 years = Sec(Seconds) 6. 25 minutes = Years 7. 20 decade = weeks 8. 2 weeks = Millisecond 9. 3 tons = mg(milligram) 10. 12oz = Kg(Kilogram) 11. 600 grams = Kg(Kilogram) 12. 20m/s = mph(mile per hour) 13. 25ft/s = m/s 14. 35Inch/minute = km/s 15. 250C = OF 16. 450F = Kelvin 17. 435K = 18. 9.8m/s2 = fu/s2 19. 20ft/s? = m/s2 20. 1.5 atm(atmospheric pressure) = Kpa(Kilopascal) Problem Solving. Show all necessary solutions. 1. The motion of a particle is defined by the relation x = (1/3)t3 - 3t2 + 8t + 2 where x is the distance in meters and is the time in seconds. What is the time when velocity is zero? 2. A particle moves along a straight line with the equation x=16t+4t2-3t' where x is the distance in ft and t is the time in second. Compute the acceleration of the particle after 2 seconds? 3. Two cars A and B travelling in the same direction and stopped at a highway traffic sign. As the signal turns green car A accelerates at a constant rate of 1m/s'. Two seconds later the second car B accelerates at constant rate of 1.3m/s2. When will the second car B overtakes the first car A. 4. Two busses start at the same time towards each other from terminals A and B, 8 km apart. The time needed for the bus to travel A to B is 8 minutes, and of the second bus from B to A is 10 minutes. How much is the time needed by each bus to meet each if they travelled at their respective uniform speeds? 5. A train changes its speed uniformly from 60mph (miles per hour) to 30mph in a distance of 1500ft. What is the acceleration? Express your answer in ft/s2. 6. A car starts from rest and has a constant acceleration of 3ft/s2. Find the average velocity during the first 10 seconds of motion. 7. A ball is thrown vertically into the air at 120m/s. after 3 seconds, another ball is thrown vertically. What must be the velocity of the second ball to pass the first ball at 100m from the ground? 8. A ball is dropped from height of 60m above ground. How long does it take to hit the ground? 9. A ball is thrown vertically upward from the ground and a student gazing out of the window sees it moving upward pass him at 5m/s. the window is 10m above the ground. How high does the ball go above the ground? 10. A player throws a baseball upward with an initial velocity of 30ft/sec and catches it with a baseball glove. When will the ball strike the glove? Assume the glove is position in the same elevation when the ball left his hand