At a construction site a bulldozer is used to move a pile of dirt what type of energy caused the pile to move? A. Nuclear energy
B. Thermal energy
C. Mechanical energy

Stephanie lives in california, and her cousin thomas lives in france. which coordinate system would be most useful if the two wanted to observe the same meteor shower and discuss their observations over online chat as they're making them? a. horizontal b. equatorial c. azimuth-altitude d. celestial or azimuth-altitude