If a person donated eyes and another person took it and the eyes color was blue so if the blind person has one eye black if he applies the blue eye would it turn to black or say the same

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.