Aball rolls from x= 10 m to x= -25 m in 2.5 seconds. what was the average velocity?
(units=m/s)
plzz

The particles of an ice cube at 0°c (represented by the blue circles) come in contact with the particles of juan’s hand at 37°c (represented by the orange circles). which diagram correctly represents the temperature of the two substances and the direction of heat flow?

What type of electromagnetic wave is used in security pens? a. x-rays c. microwaves b. visible light d. ultraviolet radiation select the best answer from the choices provided

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?