2. Which statement best describes what vibrates when a guitar is played? a)Only the strings
b)The strings and air
c)The whole body of the guitar
d)Only air

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

answer: the direction of the wind is expressed as the direction from which the wind is blowing. for example, easterly winds blow from east to west, while westerly winds blow from west to east.

explanation:

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.