The energy of a machine that is transformed into heat: is destroyed
can always be used for additional work
usually cannot do any further work
can be transformed back into mechanical energy

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)

When measuring volume, why is it important to use the correct tools and units to attain the greatest accuracy? use specific examples from the lab to support your answer. (5 points)

Atoms seldom exist as independent particles in nature a) as single particles, most atoms have low potential energy b) their electronegativity is much lower when they combine with other atoms c) atoms are more stable when they combine with other atoms d) neutral particles are rare