A spherical cavity is excised from the inside of the sphere. The cavity has radius a4a4 and is centered at position h⃗ h→h_vec, where |h⃗ |<34a|h→|<34a, so that the entire cavity is contained within the larger sphere. Find the electric field inside the cavity.

A26 cm object is 18 cm in front of a plane mirror. a ray of light strikes the object and is reflected off the mirror at a 42-degree angle. what is the angle of reflection? degrees what type of image is formed? what is the size of the image? cm

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

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