Dark matter is a concept that is used to explain the high amount of gravitational force despite a relatively low amount of mass in a given space in the
universe

the high amount of energy given a relatively low amount of velocity in the universe

the low amount of gravitational force despite a relatively high amount of mass in a given space in the
universe

the low amount of energy given a relatively high amount of velocity in the universe

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.

Should we celebrate the voyages of zheng he mini q answer key