Arny flies due east from san francisco to washington, d. c., a displacement of 5600. km. he then flies from washington to boston, a displacement of 900. km at an angle of 55. degrees east of north. what is arny's total displacement?

If a balloon is taken outside on a very cold day, what will occur?

Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.

The gun from the crime scene shows tool marks where the serial numbers are ground off. there are also tool marks on the bullets left behind. what information can the tool marks on the bullets and gun provide about the crime? what type of evidence does this information provide, individual or class?