If the density of an object is 60 g/cm^3 and its mass is 20 grams, what is its volume in cm^3?
a) 0.33
b) 3
c) 80
d) 1200

Which law represents the thermodynamic statement of the conservation of energy of a system? a. the fourth law b. the first law c. the second law d. the third law

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

Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)