(a) Two identical open boxes originally contain the same volume of water. One is kept at 15°C and the other at 85°C for the same length of time. Fig. 4.1 shows the final water levels.

With reference to the energies of the water molecules, explain why the levels are different.

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.

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

If gases like carbon dioxide and methane make up less than 1% of the total atmosphere, why is it important for scientists to monitor changes in percentages of these gases?