A 70.0 cm wire of mass 8.20 g is tied at both ends and adjusted to a tension of 41.0 N . A)When it is vibrating in its second overtone, find the frequency at which it is vibrating.
B)When it is vibrating in its second overtone, find the wavelength at which it is vibrating.
C)When it is vibrating in its second overtone, find the frequency of the sound waves it is producing.
D)When it is vibrating in its second overtone, find the wavelength of the sound waves it is producing.

An charge with mass m and charge q is emitted from the origin, (x,y)=(0,0). a large, flat screen is located at x=l. there is a target on the screen at y position y(h), where y(h) > 0. in this problem, you will examine two different ways that the charge might hit the target. ignore gravity in this problem. 1.assume that the charge is emitted with velocity v(0) in the positive x direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive y direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l. 2.now assume that the charge is emitted with velocity v(0) in the positive y direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive x direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l.

Two 2.0-cm-diameter disks face each other, 1.0 mm apart. they are charged to ±10 nc. what is the electric field strength between the disks? a proton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?

In which of these cases are the two wave points considered to be in phase with each other?