Knowing that the tension in cable ad is 405, determine (a) the

angle between cable ad and the boom ab, (b) the projection on ab of

the force exerted by cable ad at point a.

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