Refer to the diagram below. If m∠FGJ=21º, find m∠GCD.

How many neutrons does an element have if its atomic number is 40 and its mass number is 156?

After a heavy rainstorm vegetation on a hillslope was completely removed. how will this removal of vegetation affect the relative amounts of infilitration and runoff that occur during the next heavy rainstorm.

If you observe an object in the universe that is roughly 8 megaparsecs in size, what is the object most likely to be? a. elliptical galaxy b. irregular galaxy c. ultra-compact dwarf galaxy d. galaxy group e. galaxy cluster