Wind is related to the movement of warm and cold air masses. which kind of heat transfer does this represent?
a. absorption
b. radiation
c. conduction
d. convection

What produces a record of seismic waves? richter scale seismogram barometer seismograph

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?

Which is not true about oxygen-17 and oxygen-18?