What expresses a scalar quanitity?
a cat walks 5 meter in a garden.
a car move 40 m/s to the northeast
a plane flies to an airport located 350 meters to the south.
a person goes on a 3-kilometer jog from home to the store.

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?

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)

Why is no-till farming more sustainable than many traditional methods of farming