Four objects are situated along the y axis as follows: a1.96 kg object is at +2.90 m, a 2.98 kgobject is at +2.46 m, a 2.60 kg object is at the origin, and a3.99 kg object is at -0.503 m. Where is the center of mass of theseobjects?
x = m
y = m

Explain vector addition, triangle method and parallelogram method

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.

What pressure difference is required between the ends of a 2.0-m-long, 1.0-mm-diameter horizontal tube for 40 c water to flow through it at an average speed of 4.0 m/s?