I need help with the physics of life oke..oke

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

Determine the maximum r-value of the polar equation r =3+3 cos 0

A26 cm object is 18 cm in front of a plane mirror. a ray of light strikes the object and is reflected off the mirror at a 42-degree angle. what is the angle of reflection? degrees what type of image is formed? what is the size of the image? cm