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!

The car hoist allows the car to be driven onto the platform, after which the rear wheels are raised. if the loading from both rear wheels is 1380 lb, determine the force in the hydraulic cylinder ab. neglect the weight of the platform itself. member bcd is a right-angle bell crank pinned to the ramp at c. the force is positive if in tension, negative if in compression.

What is the magnitude of the resultant vector round your answer to the nearest tenth

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants