Apiece of aluminum has a volume of 4.89 x 10-3 m3. the coefficient of volume expansion for aluminum is = 69 x 10-6(c°)-1. the temperature of this object is raised from 19.1 to 357 oc. how much work is done by the expanding aluminum if the air pressure is 1.01 x 105 pa?

Ais not a compound machine. a. bolt b. shovel c. handcart (dolly) d. see-saw (teeter totter)

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.

The unit of resistivity is the: ohm ohm-cm volt coulomb