2. A membrane that only "lets" certain molecules in while keeping other molecules out is Why O flexible O bilipid layers O selectively permeable​

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form

Consider an insulating crystal, made up of layers of atoms. what form would you expect the temperature dependence of the phonon heat capacity to approach at extremely low temperatures if the interlayer coupling is i)very strong (rigid coupling), and ii) very weak. explain.