A metal rod A and a metal sphere B, on insulating stands…

    A metal rod A and a metal sphere B, on insulating stands, touch each other as shown. They are originally neutral. First, a positively charged rod is brought near (but not touching) the far end of A. Then, while the charged rod is still close, A and B are separated. Finally, the charged rod is then withdrawn.   At the end, the charge on the rod and sphere are _______________. You do NOT need to show your work or explain your reasoning.

A small object is 28 cm in front of a converging lens that h…

A small object is 28 cm in front of a converging lens that has a 16 cm focal length.   a. On your paper, draw the ray diagram with the three special rays, labeling the object position, image position, and focal points.   b. With the appropriate equation(s), calculate the image position and height. Show all of your work. Type both the value, with units if applicable, into the answer box.           Image position [position]           Image magnification [magnification]   c. Is the image real or virtual? [realvirtual] d. Is the image inverted or upright? [invertedupright] e. Is the image smaller or larger than the object? [smallerlarger]

A pendulum is pulled to the side and released. The mass swin…

A pendulum is pulled to the side and released. The mass swings to the right as shown. The diagram shows positions for half of a complete oscillation. You do NOT need to show or explain your work for this question.     a. At which point or points is the speed the greatest? [parta] b. At which point or points is the speed zero? [partb] c. At which point or points is the potential energy the greatest? [partc] d. At which point or points is the kinetic energy the greatest? [partd]  

  A 3.25 m long string is fixed at both ends and tightened u…

  A 3.25 m long string is fixed at both ends and tightened until the wave speed is 52.5 m/s.   a. What is the mode number? [mode] For parts b, c, and d, using three significant figures, type both the number and the units into the answer box. Show all of your work. b. What is the frequency of the standing wave shown in the figure? [frequency] b. What is its wavelength of the wave shown in the figure? [wavelength] c. What is its fundamental frequency? [fundamental]