Why isn't pure copper used for bells instead of bronze?

What does standard deviation reveal about data? a. the average of all the data points b. which of the data points is most reliable c. how spread out the data points are d. the percent error included in the data

When the volume and number of particles of a gas are constant which of the following is also constant

The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is call