1.33 (3) A
way of light is incident in water al an angle of 70
water. glass place surface calculate the angle
of retraction in
glass in each case.
Langa 1.5 and a Mwa 2:33).
→ doln-
i= 70​

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants

12. a body is a particular amount of matter. it can be a solid, liquid or gas. it can be described as existing in a. size and shape. b. motion and force c. time and space. d. location and movement.

The three classes of rocks are sedimentary, metamorphic, and igneous. how are rocks classified into one of these three groups?