You are building a shelf at home. as you sand the wood, dust floats into the air. the air and dust from sanding create which of the following? a) a solution b) a pure substance c) a colloid d) a suspension

Atransverse wave is traveling on a string stretched along the horizontal x-axis. the equation for the vertical displacement y of the string is given by y = (1.8 x 10-3)cos[π(13x - 60t)], where all quantities are in si units. what is the maximum speed of a particle of the string

In an experiment, how can i change human errors? be specific.

Frank just graduated from eighth grade. assuming exactly four years from now he will graduate from high school how many seconds does he have until his high school graduation