3. A student drops a 0.35-kg ball that hits the floor with a speed of 6.3 m/s. If the speed of the ball is 5.3 m/s when it hits the floor on its second bounce, how much mechanical energy is lost during the first bounce?
(A) 2.0 J (B) 4.0 J (C) 4.9 J (D) 6.9 J

Students in an introductory physics lab are performing an experiment with a parallel-plate capacitor made of two circular aluminum plates, each 11 cm in diameter, separated by 1.0 cm. how much charge can be added to each of the plates before a spark jumps between the two plates? for such flat electrodes, assume that value of 3×106n/c of the field causes a spark.

Compare the patterns of the two waves shown in the image. which statement is true about these waves?

The chart shows daniela’s run through her race. what is her velocity? 1.5 m/s 2 m/s 2.5 m/s 5 m/s