Aglass plate whose index of refraction is 1.66 is immersed in a liquid. the surface of the glass is inclined at an angle of 44º with the vertical. a horizontal ray in the glass is incident on the interface. when the liquid is a certain alcohol, the incident ray arrives at the interface at the critical angle. the index of refraction of the alcohol is closest to: o a. 1.13 ob. 1.17 o c. 1.15 o d. 1.11

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

Afrequency generator sends a 550 hz sound wave through both water and ice. what is the difference in wavelength between the wave produced in ice and the wave produced in water?

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.