When you are measuring the length of simple pendulum's moment arm (distance to center), which statement is right. (ppt)
a)measure the distance between the center of mass of the pendulum bob and the pivot of the string.
b) the string doesn't need to be taut
c) pivot and center of mass of bob are same thing
grav potential energy
molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.
technology is the application of the knowledge gained by science.