Test driver at incredible motors is testing a new model car with a speedometer calibrated to read m/s rather than mile/h. the following series of speedometer readings was obtained during test run
along the long straight road
T[s] 0 2 4 6 8 10 12 14 16
V[m/s] 0 0 2 6 10 16 19 22 22
[a] Compute the average acceleration during each 2 second time interval. Is acceleration constant
? Is it constant during any part of the test run?
[b] make acceleration time graph for the data above. From the graph find instantaneous
acceleration at t=9s, t=13s and t=15s

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)

Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.