A sample of gas does 150J of work against its surroundings and loses 90J of internal energy in the process. Does the gas gain or lose heat, and how much?

What is the fate of the electrons that interact with a specimen in an electron microscope?

Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.