0. shop
- The best precision tool to check perpendicularity of two part surfaces is a
a. combination square.
b. surface plate.
c. beveled solid square.
d. thick steel rule.

An electric kettle is made out of stainless steel, weighs two pounds (when empty) and is equipped with a heating element that consumes 2 kw of electricity. assuming that the water and the kettle are at the same uniform temperature at any moment of time, calculate the shortest possible time to bring 2 quarts of water from room temperature to the onset of boiling