The virtual image produced by a convex mirror is one third the size of the object.(a) if the object is 51 cm in front of the mirror, what is the image distance? (include the sign of each answer.)cm(b) what is the focal length of this mirror? cm

(a) -17 cm

Magnification equation:

where

is the size of the image

is the size of the object

is the distance of the image from the mirror

is the distance of the object from the mirror

In this problem, we have:

p = 51 cm (the object is 51 cm in front of the mirror)

So, we can find q, the image distance:

and the negative sign means the image is virtual.

(b) -25.5 cm

Mirror equation:

where

p = 51 cm

q = -17 cm

Substituting and re-arranging the equation, we find the focal length of the mirror:

and the negative sign is due to the fact it is a convex mirror.

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is