Velocity range 0-200 m/s 200-400 m/s 400-600 m/s 600-800 m/s 800-1000 m/s 1000-1200 m/s #of balls at 500 m/s of balls at 700 m/s of ball at 900m/s 4 0 1 3 1 3 1 3 5 4 1 3 5 0 1 2 1200-1400 m/s 0 0 1 over 1400 m/s 0 0 mass of one ball initial k. e. of the system 4.34556e-26 4.35e-26 4.34556e-26 2.64e-19 8.15e-20 1.60e-19 minimum k. e. after 60 sec. k. e. % error maximum k. e. after 60 sec k. e. % error initial and max 1.99e-19 5.12776e-20 6.60526e-20 3706.67% 5863.95% 2460.91% 1.25152e-19 2.81592e-19 8.25874e-20 136.00% 2163.27% 666.67% average k. e. max and min 9.56e-20 6.69325e-20 2.40e-19

3. on your graph, the data points between the black squares are data for elements with atomic numbers 3 through 9. locate these elements on your periodic table. what term or description would you use to identify these elements with respect to the periodic table?

What makes thermal imaging cameras useful? they can detect differences in color. they can detect differences in wave speeds. they can detect differences in temperature. they can detect mechanical waves.

Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to.in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?