Q2- A piston/eylinder contains carbon dioxide at 300 kPá,100 °C with a volume of 0.2 m. Mass is added at such a rate that the gas compresses aceording to the relatien tri constant te a final temperature of 200 C. Determine the finat vohnne and the work donc during lhe process assuming idcal gas behavior

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.

An object's buoyant force and weight mean the same thing.a. trueb. false

Acharge q experiences no net force at a particular point in space. which of the following situations described below must always be true? -there are no other charges nearby. -if there are other charges nearby, they must all have the same sign as q. -if there are other charges nearby, they must all have the opposite sign of q. -if there are other charges nearby, the total positive charge must equal the total negative charge. -none of the above