What does it mean if an experiment exhibits reproducibility? a.)the experimental conditions are simple and do not require a lot of materials. b.)the experimental conditions are always kept the same. c.)the results of the experiment are always accurate. d.)the same results are expected each time the experiment is done.

What is the final velocity of the initial velocity of 25 and -50?

Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon