The tilt of the earth's axis of rotation changes over a period of 41,000 years. which of these statements best predicts a long term effect of the changes in the tilt of the earth's axis of rotation? a. the earth's climate would change. b. the sun would emit harmful gases. c. the shape of the earth would change. d. the sun would move closer to the earth.

Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.

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