How would you compare a block spere represantation of computational basis states lying at 180 degree angle and a complex plane reprsentation where they are unitary and ly at 90 degree angle

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

If element x has 99 protons how many electrons does it have

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?