What determines what we call the phases of the moon?

Different fractions of the moon

Areas of the moon we cannot see

Days on the calendar
No answer text provided.

Which instrument is used to measure air temperature

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

Suppose an objects initial velocity is 10m/s and it’s final velocity is 4 m/s. mass is constant. what can best be concluded about the object based in the work-energy theorem