a person walks 15 meters in the direction 60 degrees north of east. How far north and how far east had he walked?

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost

The radius of a sphere is increasing at a rate of 9 cm/ sec. find the radius of the sphere when the volume and the radius of the sphere are increasing at the same numerical rate.