A 142 cm tall person stands 250 cm from a camera, which has a 15.0 cm focal length lens. How big is the image of the person on the film?
(Unit=cm)

4.494×10^-4cm

Explanation:

height of object=142cm

obj.distance=250cm

focal length=15cm

height of image=x

v=uf/u-f

v=(250)(15)/250-15

v=15.957cm

height of image/height of object=image distance /object distance

x/142=15.857/250

250x=15.957/142

x=15.957/142×1/250

x=4.494×10^-4cm

which three statements are true about all alloys?

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide