It can also lead to diarrhea, loss of appetite, and a risk for infections.â. Hair loss and poor wound healing also can be signs of a zinc deficiency, adds Rachel K. Johnson, PhD, MPH, RD, associate provost and a professor of nutrition at the University of Vermont in Burlington.
projector definition: a person or thing that projects; specif., a machine for throwing an image on a screen, as from a transparent slide or film (noun)... Definitions
An overhead projector is a good example of such a tool. Draw a groundhog on a piece of paper and cut it out. Place it on the overhead projector, so that its shadow is cast onto a screen at the front of the room. Now measure your cutout and then measure the image on the screen.