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

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.