With the sun and the earth back in their regular positions, consider a space probe with mass mp = 125 kg launched from the earth towardthe sun. When the probe is exactly halfway between the earth andthe sun along the line connecting them, what is the direction ofthe net gravitational force acting on the probe? Ignore the effects of other massive objectsin the solar system, such as the moon and other planets.
A. The force is toward the sun.
B. The force is toward the earth.
C. There is no net force because neither the sunnor the earth attracts the probe gravitationally at themidpoint.
D. There is no net force because the gravitationalattractions on the probe due to the sun and the earth are equal insize but point in opposite directions, so they cancel each otherout.
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Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.
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With the sun and the earth back in their regular positions, consider a space probe with mass mp = 12...
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