Which of the following shows the correct order of inventions that helped the first computers make calculations?

A. 1st- Transistors, 2nd- Vacuum tubes, 3rd- Mechanical Relays

B. 1st- Vacuum tubes, 2nd- Mechanical Relays, 3rd- Transistors

C. 1st- Mechanical Relays, 2nd- Vacuum tubes, 3rd- Transistors

When subject to a steady load (within elastic range) over a long period of time, what is the major difference in material behavoir between steel and plastic?

The maximum shear stress and maximum flexural stress occur at the same location along a beam subjected to a non-uniform bending load. a)-trune b)- false

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