Amixture consists of sand, salt, and iron filings. which of the following instruments or materials would not be useful in separating this mixture?

magnet
filter paper
screen
water

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)

12. a body is a particular amount of matter. it can be a solid, liquid or gas. it can be described as existing in a. size and shape. b. motion and force c. time and space. d. location and movement.

The diagram shows a wave. the quantity shown is the amplitude. this quantity is directly proportional to which of these other quantities? a) energy b) frequency c) period d) wavelength