What is the refraction index of a medium? -the ratio of the velocity of light in the medium over the velocity of light in a vaccum-the ratio of the velocity of light ina vacuum over a velocity of light in the medium-the ratio of the angle of incidence over the angle of refraction-the ration of the angle of refraction over the angle of incidence

Multiply or divide to make this english distance conversion. 174 inches = feet (14.5, 58, 2,088, 23)

Along wire carrying a 4.2 a current perpendicular to the xy-plane intersects the x-axis at x=−1.7cm. a second, parallel wire carrying a 3.0 a current intersects the x-axis at x=+1.7cm. part a at what point on the x-axis is the magnetic field zero if the two currents are in the same direction? express your answer to two significant figures and include the appropriate units.

How many meters will a car travel if its speed is 45 m/s in an interval of 11 seconds? question 2 options: a) 450 meters b) 495 meters c) 4.09 meters d) 498 meters