What is an amu?
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Smog is the term used to describe the combination of fog and smoke

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd a) 30 joules b) 3000 joules c) 320 joules d) 3200 joules

Which of the following involves only abiotic factors? a. a large rock being weathered by wind and rain b. an otter using a stone to break open a sea urchin c. a spider building a web in the corner of a building d. a pine tree absorbing light from the sun