What are the equations for energy balance for the system as a whole (calculated at the edge of space) and for the atmosphere.

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass

On mars a rock falls an unknown vertical distance from a resting position and lands in a crater. if it takes the rock 2.5 seconds to fall, how high is the cliff the rock fell from? mars' surface gravity is 3.8 m/s2.