A sample of silicon has an average atomic mass of 28. 084amu. In the sample, there are three isotopic forms of silicon. About 92. 22% of silicon atoms are 27. 9769amu, which have the mass of 28si; about 4. 68% are 28. 9764amu, which have the mass of 29si, and the isotope 30si, makes up the remaining 3. 10%. Calculate the atomic mass of 30si. Report your answer with three significant figures.

What are the three stages of volcanic activity? a. active, magma, lava c. extinct, eruption, explosive b. eruption, quiet, explosive d. active, dormant, extinct

How did loftus interpret false memories? a. because of their desire to whoever is asking them about their memories people will often go along with what they want to hear b. eyewitness memories becomes faulty when we make errors in identifying the source of information we have stored in long term memory c. we accept subsequent misinformation as being correct, and this information becomes part of our memory for the original event d. when we retrieve a memory for a particular event from long-term memory, we also retrieve information from other sources relevant to the event

Analyze the forces acting on a cyclist who is slowing down as he or she climbs a hill