Crucible
10.00 g

crucible and hydrate before heating
15.32 g

crucible and hydrate after first heating
15.10 g

crucible and hydrate after second heating
14.65 g

cindy and blake performed and experiment in which they were evaporating water from a compound. their teacher told them that the accepted value for the mass of water in the compound was 0.70 grams. use the data from the table to calculate the percent error of their experiment.

a)
4.29%

b)
6.43%

c)
31.43%

d)
56.42%

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.