Which of the following is a displacement? a. 5 m/s c. -0.7 m/s2 b. 10 ft d. 3 blocks east

From center station, a train departs every 30 minutes on the fast line and a train departs every 50 minutes on the state line. if two trains depart from center station at 8: 00 a.m., one on each of the two lines, what is the next time that two trains, one on each line, will depart at the same time?

If a substance is in the gas phase, which of qualities of the gas will stay constant? a: volume b: mass c: shape d: position of particles

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