Using the triple beam balance scale to find the mass of an object the first beam is 100, the second is 40 and the third is 7.2. What is the objects mass?

The activity of the modern sample is 1.10 bq . how long does that measurement take?

The double bond between a carbon atom and two oxygen atoms (a molecule of carbon dioxide) has two characteristics. what are they? a.an ionic bond is formed between the oxygen and carbon atoms. b.four valence electrons are shared. c.two valence electrons are shared. d.valence electrons are shared between oxygen atoms.

What are 3 reasons that natural selection occurs