The drinking bird was invented in the 1940s by American chemist Miles Sullivan (patented in 1945). Once the "bird" starts drinking, it keeps swinging and "drinking" for ever. There is complex physical and chemical activity going on inside the toy, which keeps the simple heat engine running forever without a battery.  Explain the operating principle behind the Drinking Bird? (15 points)  Describe yet another tall claim for a perpetual machine and explain how it violates the Second Law of Thermodynamics? ( 10 points)

Which best describes the difference between internal and thermal energy?

Atruck with 34-in.-diameter wheels is traveling at 55 mi/h. find the angular speed of the wheels in rad/min, *hint convert miles to inches & hours to minutes:

An ascending elevator, hanging from a cable, is coming to a stop. part a part complete identify all forces acting on the elevator from the list below. select all that apply. select all that apply. kinetic friction normal force tension weight static friction submitprevious answers correct part b draw a free-body diagram of the object. draw the vectors starting at the black dot. the location and orientation of the vectors will be graded. the exact length of your vectors will not be graded but the relative length of one to the other will be graded.