An incident ray is parallel to the principal axis of a convex mirror. After the reflection, the reflected ray - A - Passes through centre of curvature
B - retraces the path of incident ray
C - goes to other side of the principal axis by obeying laws of reflection
D - appears to be diverging from principal focus

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above

Adiver named jacques observes a bubble of air rising from the bottom of a lake (where the absolute pressure is 3.50 atm) to the surface (where the pressure is 1.00 atm). the temperature at the bottom is 4.00 ∘c, and the temperature at the surface is 23.0 ∘c. what is the ratio of the volume of the bubble as it reaches the surface (vs) to its volume at the bottom (vb)? if jaques were to hold his breath the air in his lungs would be kept at a constant temperature. would it be safe for jacques to hold his breath while ascending from the bottom of the lake to the surface?

During cooling, the kinetic energy of the molecules falls. why does this happen? a. the motion of the molecules increases. b. the motion of the molecules slows down. c. the van der waals forces between molecules decrease d. the forces of attraction between the molecules are overcome.