1. 2.
Numerical problems
Calculate pressure when a box of 250 N weight is placed on the surface of
25 m² area. (Ans: 10 Pa)
A person with a weight of 500 N is standing on the surface applying 100 Pa
pressure. Calculate the surface area that is covered by him. (Ans: 5m²)
A body weighed 30 kg is placed on the square surface of 10 m length.
Calculate the pressure applied to the surface assuming the value of
acceleration due to gravity 10m/s2. (Ans: 3 Pa)
3.

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.

In a good thermo flask the main cause of heat loss is

Which is the most accurate name for the ionic compound cas?