If the light rays in the incident ray originate at 20º from the surface... What is the angle for the incident ray?

a.) 10 degrees

b.) 20 degrees

c.) 40 degrees

d.) 70 degrees

e.) 90 degrees

What is the angle for the reflected ray?

a.) 10 degrees

b.) 20 degrees

c.) 40 degrees

d.) 70 degrees

e.) 90 degrees

Can someone help me with this please? Thank you!

First answer marked as brainiest which is the correct equation describing the first law of thermodynamics? a) when the internal energy of a system changes, it equals the amount of heat added plus the work done. b) when work is done by the piston, it is equal to the heat added plus the change in internal energy of the system. c) when heat is added to the system, it is equal to the amount of work done by the piston plus the change in internal energy of the system.