Suppose mercury had 5-to-3 spin-orbit coupling and that its sidereal period remained 88 days, as now. you observe the sun directly overhead in the mercurian sky and then observe again from the same location 88 days later. where will the sun be in the sky? (mercury, like the earth, rotates toward the east.)
a) below the eastern horizon
b) below the western horizon
c) directly overhead again
d) directly on the opposite side of the planet

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.

A0.750 kg aluminum pan is removed from the stove and plunged into a sink filled with 10.0 kg of water at 293 k. the water temperature quickly rises to 297 k. what was the initial temperature of the aluminum pan? the specific heat of aluminum is ca = 900 j/(kgk) and water is cw = 4190 j/(kgk)