During a solar eclipse, the moon is positioned directly between earth and the sun. find the magnitude of the net gravitational force acting on the moon during the solar eclipse due to both earth and the sun. the masses of the sun, earth, and the moon are 1.99×10301.99×1030 kg, 5.98×10245.98×1024 kg, and 7.36×10227.36×1022 kg, respectively. the moon's mean distance from earth is 3.84×1083.84×108 m, and earth's mean distance from the sun is 1.50×10111.50×1011 m. the gravitational constant is =6.67×10−11 nm2/kg2g=6.67×10−11 nm2/kg2 .

Asubmarine has a "crush depth" (that is, the depth at which water pressure will crush the submarine) of 250 m. what is the approximate pressure (water plus atmospheric) at this depth? (recall that the density of seawater is 1025 kg/m3, g = 9.81 m/s2, and 1 kg/(ms2) = 1 pa = 9.8692 10-6 atm.) a. 34.8 atm b. 24.8 atm c. 25.8 atm d. 7.8 atm

Avehicle has an oil leak that is causing the entire oil pan to be wet, but inspection reveals no exact source after cleaning off the oil residue. technician a says to install a fluorescent dye in the crankcase and operate the engine, then re-inspect for leaks with a special light (black light). technician b says the oil leak may be coming from a source at the top of the engine, such as a valve cover gasket. who is correct?

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.