A uniform rigid thin rod of length 1 m and mass 2.08 kg is moving on a horizontal xy plane. At a certain instant when the rod is along the y-axis, the instantaneous velocities of the two ends of the rod, A and B, are (1.97 m/s) i vector and (10.27 m/s) i vector, respectively. What is the total kinetic energy of the rod at this moment in units of J?

If this plastic cup is heated to its melting point, what will eventually happen to all the particles in the plastic? a. the particles will begin to move enough that they slide past each other. b. bonds will form and the liquid will become a solid. c. the spaces between the particles will get smaller. d. the particles will change state and become a crystalline solid.

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

The air that we breath is made mostly of which gaseous molecule