Iam driving 65 mph when i suddenly come to a stop. my acceleration was -9.2 m/s squared. how long did it take me to stop?
hint: convert mph to m/s first

Identify the arrows that show the correct direction of heat transfer. 66°f 112°f 98°f

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.

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