Which of the following is not true in regard to noble gases? a. these elements have full outermost shells. b. these elements are found in the last column (group 18) on the periodic table. c. these elements tend to gain or lose electrons easily. d. these elements tend to be relatively inactive.

Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.

An insulated thermos contains 148 g of water at 72.7 ˚c. you put in a 11.7 g ice cube at 0.00 ˚c to form a system of ice + original water. the specific heat of liquid water is 4190 j/kg•k; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?