In 2014, a space probe approached the rocky core of the comet churyumov-gerasimenko, which is only a few km in diameter. the probe then entered the orbit around the comet at a distance of 30 km. the comet was found to have a mass of 1.0×1013kg.

what was the orbital period of the probe around the comet, in earth days?

express your answer in days.

Aforce of 34.5 newtons is applied to an object at an angle of 45 º with the horizontal. what is the force acting on the object in the horizontal direction?

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.

Explain what will happen if decomposers were apsent from a forest ecoysystem.