An object is placed a distance of 50 cm from a convex mirror of radius 40 cm. what is the magnification? o 3.5 o 2.5 o 0.3 0.5

Explanation:

Given that,

Object distance, u = -50 cm

Radius of curvature of the convex mirror, R = 40 cm

Focal length of the convex mirror,

We need to find the magnification of the mirror. Firstly, it is required to find the image distance using formula as:

v = 14.28 cm

Magnification of the mirror,

m = 0.28

So, the magnification of the mirror is 0.28.Hence, this is the required solution.  

freezing

deposition

condensation

explanation;

melting also called fusion is the process where solid becomes liquid, sublimation is the process where solid becomes gaseous without first changing to liquid, deposition involves change from gaseous to solid state, freezing involves change from liquid to solid, boiling or evaporation involves change of liquid to gaseous state, while condensation is the change from gaseous state to liquid state.

endothermic reactions involves absorption of heat from the surroundings or the environment while exothermic reactions involves loss of heat energy to the surroundings.

in this case, sublimation, evaporation and melting are endothermic reactions (gain energy from the environment) while, freezing, deposition and condensation are exothermic (loss of energy to the surroundings) reactions.

yup its correct its: c) b b