An astronaut holds a rock 100m above the surface of planet x. the rock is then thrown upward with a speed of 15 m/s, as shown in the figure. the rock reaches the ground 10s after is thrown. the atmosphere of planet x has a negligible effect on the rock when it is in free fall.

Asap 1. which surface feature of the moon is characterized by mountainous areas? question options: maria terrae regolith craters 2.which statement describes surface features called maria on the moon? question options: layers of dust and rock deep areas of cooled lava deep, rocky and barren valleys highlands and mountainous areas

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.