Your pencil rolled off your table (2m tall ) and fell for 0.5 seconds. What was its speed when it hit the floor ?

Which would not reduce the amount of green house gasses in the air

In a closed system, the total energy prior to an energy transformation is the total energy after. a. equal to b. unrelated to c. greater than d. less than

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?