The resistance of a circuit is doubled. how is the value of the current affected? a. the current decreases by a factor of 1/4 b. the current decreases by a factor of 1/2 c. the current increases by a factor of 2. d. the current increases by a factor of 4.

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

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.