The radius of a circle is 7 kilometers. What is the length of a 180° arc?

Identify the type of chemical reaction involved in each action.

Eastern europe’s population growth can be attributed to these factors. select all that apply migration

Sandstones that form in aeolian (wind/desert) environments appear very different from other sandstones, such as those formed in a beach/ shoreline environment and in rivers on land. give three identifying properties for each of the three sandstones that would tell a geologist which depositional environment they formed in. consider things such as the relationship between transportation and grain size, shape, roundness, sorting, fossils and composition.