If there was an sudden change in exchange rates that resulted in fewer u. s. dollars being required to buy a euro, you could expect

List one type of erosion and describe how it happens?

If a clock aboard a space ship traveling at 0.900 c of the speed of light relative to earth chimes once at the beginning of the hour and again when it reads one hour later, how much time would an observer on earth say elapsed between the two chimes?

If a sphere and a cure have the same mass and are propelled up a ramp with the same force, which would travel father up the ramp? explain.