Apiston-cylinder assembly contains propane, initially at 27°c, 1 bar, and a volume of 0.2 m^3. the propane undergoes a process to a final pressure of 4 bar, during which the pressure-volume relationship is pv(1.1) =constant. for the propane, evaluate the work and heat transfer, each in kj. kinetic and potential energy effects can be ignored.

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.