An archer shoots an arrow into a target using a bow. If the "action" force is the force of the bowstring against the arrow, what is the "reaction force? a. the arrow's push against the bowstring
b. weight of the arrow
c. the archer's hand gripping the bowstring
d. the bowstring's force on the bow

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?

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?

If you place a magnet under a clear dish, and sprinkle iron fillings over it, above what part of the magnet will most of the fillings gather