Amanda wants to experiment with sugar cubes. Which of the following causes a sugar cube to only change
physically, not chemically?

A) burning the sugar cube with a match
B) crushing the sugar cube and dissolving it in water
C) dehydrating the sugar cube with sulfuric acid
D) chewing the sugar cube and digesting it

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.

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.

Agust of wind pushes a beach ball with a force of 9 newtons. the ball rolls 10 meters in 3 seconds. what is the power of the wind? 900 w 90 w 30 w 3 w