All of the following questions are testable in a scientific exploration about changes to earths surface except-a: how can the effects of wind and water erosion be measured? b: how does water erosion and deposition result in construction of a delta? c: why the sun appear to move across the sky? d: what constructive forces result in changes to earths surface?

The radius of an atom is closest in size to a

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.

Atemperature inversion can cause a warm air mass to move over a colder air mass. this traps the colder air mass and prevents surface air from rising. this may result in which of these? a) smog b) acid rain c) freezing rain d) a thunderstorm