Which of these is an experiment generally regarded as being first carried out by james joule?
observing that objects increase in temperature when heated with fire
showing that friction slows down the motion of objects
measuring the temperature increase of water from doing work stirring it
testing the mechanical advantage of pulleys

The crank oa rotates in the vertical plane with a constant clockwise angular velocity ω0 of 5.6 rad/s. for the position where oa is horizontal, calculate the force under the light roller b of the 10.6-kg slender bar ab.

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.

Place me with this question is my last question