Identifying Wave Interactions
Which ray diagram demonstrates the phenomenon of refraction?
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Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

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

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.