1. a mechanical wave
a. carries energy from one place to another
b. moves through solids, liquids, and gasses
c. is created when a source of energy creates a vibration
d. all of the above

2. in refraction when a wave travels from one medium to another
a. changes speed
b. stays in step
c. always moves in the same direction
d. travels in the opposite direction

plzzz me !
i understand that it is wrong to give answers but i need them for unit 3 lesson 12 , me graduating rides on this

The two metal spheres in the figure are connected by a metal wire with w switch in the middle. initially the switch is open. sphere 1, with the larger radius, i'd given a positive charge. sphere 2, with the smaller radius, is neutral. then the switch is closed. afterward, sphere 1 has charge q1, is at potential v1 and the electric field strength at its surface is e1. the values for sphere 2 are q2, v2, and e2. a. is v1 < ,> , or = to v2? explain. b. is q2 < , > , or = explain? c. is e1 < ,> ,or = to e2? explain?