6. The cue ball going 9 m/s heads directly toward a 0.17 kg object ball at rest near the pocket. During the elastic collision, the cue ball stops and the object ball is
launched forward at 9 m/s. What is the cue ball's mass?
7. A golfer hits a 0.050-kg golf ball, giving it a speed of 75 m/s. What impulse does
he impart to the ball?
8. Joe hits a stationary 0.12-kg hockey puck with a force that lasts for 0.001 sec and
makes the puck shoot across the ice with a speed of 20.0 m/s, scoring a goal for
the team. With what force did Joe hit the puck?

Laboratory experiments, observational field studies, and model-building are all examples of different forms of scientific investigations.  in what way do laboratory experiments primarily differ from other forms of scientific investigations?   a.  a laboratory experiment is the only accepted form of investigation within the scientific community.  b.  studies about how things behave in nature or studies involving very large objects are best answered through laboratory experiments.  c.  laboratory experiments involve the identification and control of variables.  d.  data can only be generated through laboratory experiments, not other forms of investigation.

How many dots must be added to the symbol to properly represent a standard nitrogen ion? a) 1 b) 3 c) 5 d) 8

Which of the following elements is in the same period as phosphorus? a. carbon c. nitrogen b. magnesium d. oxygen select the best answer from the choices provided a b c d