Which of the following statements best characterizes the surface of the planet mars? the surface of mars is continuously resurfaced by ongoing volcanic activity; consequently, there are almost no visible impact craters. all the big volcanoes are in the northern hemisphere of mars, and most of the craters are in the southern hemisphere. eighty percent of the surface of mars is rolling plains, with a number of major volcanoes and only two continent-sized uplands. on mars there are several moving lithospheric plates rimmed by long mountain chains, deep subduction trenches, and several large rift valleys.

1. consider the case in which air fills air shocks on a truck trailer. the pressure in the shocks is 2 mpa. the temperature is 300 k. the diameter of the shock piston is 10 cm and the initial length of the cylindrical cavity containing the compressed air is 40 cm. a. the truck is gradually loaded over a period of a day in a static setting. the temperature is held constant for the atmosphere and thus for the gas shock. calculate the compressibility of the air in the shock for this condition when the truck is initially being loaded. b. if the shocks were loaded in a dynamic setting by driving over bumps, what would be the compressibility? state your assumption. c. what is the initial load on the shock if the shock is in an atmospheric 100 kpa? d. if the shock is compressed using the process described in part a, and the air shock compressed air cavity length decreases to 20 cm, what is the additional load applied to the shock?

Aforklift raises a 1,020 n crate 3.50 m up to a shelf. how much work is done by the forklift on the crate? the forklift does j of work on the crate.

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of