Ahockey puck (1) of mass 180 g is shot west at a speed of 8.40 m/s. it strikes a second puck (2), initially at rest, of mass 144 g. as a result of the collision, the first puck (1) is deflected at an angle of 38° north of west and the second puck (2) moves at an angle of 40° south of west. what is the magnitude of the velocity of puck (1) after the collision?

Aforce of 34n stretches a very light ideal spring 0.73 m from equilibrium, what is the force constant (spring constant) of the spring? (a) 47n/m (b) 38n/m (c) 53n/m (d) 25n/m

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.

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx hurrim timed