When two waves with the same amplitude overlap so that a crest lines up with a trough, the resulting wave...

Increases

Decreases

Stays the same

Nothing happens

Aforce of 200 n is applied to an input piston of cross-sectional area 2 sq. cm pushing it downward 2.8 cm. how far does the output piston of cross-sectional area 12 sq. cm move upward? show all work.

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.

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.