An object is set 20.0 cm in front of a concave
mirror with a radius of 40.0 cm. (a) What is the
focal length of the mirror? (b) Where is the image
formed? (c) What is the lateral magnification?
(d) Describe the image.

conduction, convection, radiation

if i am correct, your answer choices are:

a. the temperature remains constant

b. the temperature increases at a constant rate

c. heat flows at a constant rate into the system

d. heat flows at a constant rate out of the system

e. no heat flows into or out of the system

if so, then the answer is e. no heat flows into or out of the system.