Which method would you use if you have a pile of gravel with different types of rocks and minerals i needed to separate them into their individual
evaporation.
distillation.
filtration.
chromotography.

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to.in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?

What is the major limitation to the light microscope?