1. as described by the first law of thermodynamics, the change in internal energy of a system is equal to a. the sum of the heat added and work performed b. the difference between the heat added and work performed c. the product of the pressure and change in volume d. the ratio of the heat added to the work performed 2. a 3.1-mole sample of an ideal gas is gently heated at constant temperature 290 k. the gas expands to 1.5 times its initial volume as its pressure decreases. what is the change in the internal energy of the gas? let the ideal-gas constant r = 8.314 j/(mol • k). a. 0 j b. 1500 j c. 3000 j d. -3000 j just give the answer no long answers

Complete the statement about memory improvement. ( )involves organizing and breaking down information into easier groups to expand capacity. rehearsal is the verbal repetition of information. these techniques are especially important for the improvement of ( ) memory.

The coulomb's law explains which of the following? select all the force between two charged objects is inversely proportional to the charge on each object. the force between two charged objects is directly proportional to the charge on each object. the force between two charged objects is directly proportional to the distance separating them. the force between two charged objects is inversely proportional to the square of the distance separat coulomb's law is similar to newton's 2nd law. if the force between two objects is f and the charge on both objects is doubled, the new force between the would now be 2f. if the force between two objects is 2f and the distance separating them is doubled, the new force between the objects would now o the be zf.

The dot diagram represents the motion of the motorcycle as it moves from left to right