4.30 m long string vibrates at 640 Hz with successive nodes at 1.90m, 2.50 m and 3.10 m from one end of the string. a. Which harmonic is this?
b. Sketch this harmonic on the string.
c. What is the strings fundamental frequency?
d. What is the speed of the wave on the string

Me ! a 2 µc charge q1 and a 2 µc charge q2 are 0.3 m from the x-axis. a 4 µc charge q3 is 0.4 m from the y-axis. the distances d13 and d23 are 0.5 m. find the magnitude and direction of the resulting vector r. round your answer to the nearest tenth.

When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)

Directions: count the number of atoms. ar co2 na3po4 so3 nac2h3o2