In an early spring, the warm sunshine melts snow on a sidewalk. A puddle of liquid water forms. How do the water particles change as the snow melts into liquid water?

Astudent looks at ocean waves coming into the beach. an ocean wave with more energy will a) have a greater height. b) have a greater period. c) travel toward the beach faster. d) strike the beach with greater frequency.

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.

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.