When energy from the sun hits the air above land, the air warms up and rises. Along a
coastline, cooler air above the ocean flows
toward the land and replaces this rising air.
Which best describes these processes?
(A) conduction and convection
B conduction, convection, and radiation
radiation and conduction
D radiation and convection

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s