Is a quantity that measure the effects of a force acting over a distance.

If the radius of curvature of the cornea is 0.75 cm when the eye is focusing on an object 36.0 cm from the cornea vertex and the indexes of refraction are as described before, what is the distance from the cornea vertex to the retina? express your answer to two significant

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?

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