7. A piece of machinery with a moment of inertia of 2.6 kg mº rotates with a constant angular speed of 4.0 rad/s when a frictional torque of 0.56 m Nacts on it. What is the net torque acting
on the piece? (explain with a correct answer)

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is as it changes into other forms of energy.

What happens when the number of protons in an atom changes