A tennis ball is thrown vertically upward with an initial velocity of +8.0 m/s.
a. What will the ball's speed be when it returns to its
starting point?
b. How long will the ball take to reach its starting
point?

Ahorizontal wire is tied to supports at each end and vibrates in its second-overtone standing wave. the tension in the wire is 5.00 n, and the node-to-node distance in the standing wave is 6.28 cm. (a) what is the length of the wire? (b) a point at an anti- node of the standing wave on the wire travels from its maximum upward displacement to its maximum downward displacement in 8.40 ms. what is the wire's mass?

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Which is special about a dc circuit ? a. it has both series and parallel components b. it has only series or only parallel components c. charge moves in a single direction d. charge moves back and forth quickly