Can like someone help me​

What precautions should you take to prevent injuries when dealing with heavy loads?

The sum of the normal stresses does not change as the stress state rotates through an angle. a)-trune b)- false

An electrical kettle is made out of stainless steel, weighs two pounds (when empty) 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.