5. Con respecto al gráfico de velocidad vs tiempo, donde la velocidad está en [m/s] y el tiempo en [s], podemos afirmar correctamente que: I. Su aceleración durante los tres primeros segundos es de 3[m/s^2 ]. II. Su aceleración entre los tres y cinco segundos es de 9[m/s^2 ]. III. Su desaceleración en los últimos 9 segundos es de -1[m/s^2 ]

Edward tolman explained the results of his study by theorizing that the rats were learning about the maze during every trial but they a. were agitated because other groups were getting reinforcement b. could not remember how to demonstrate it without reinforcement c. were not motivated to demonstrate it without reinforcement d. seemed to be too lazy to actually work without reinforcement

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.

Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)