A violinist on stage plays a middle C note of 262HZ on a day when the speed of sounds is 343m/s. The sounds is emitted in unison from two speakers in the picture. Two people stand at the point A&B in the picture, distances shown below. Which of the two people will hear completely destructive interference if any? Justify your answer.

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.

Define a electrical circuit. what requirements does it have to be a electrical circuit? give one example.

The solubility of co in water at 0°c and 1 atm co pressure is 0.0354 mg of co in 1 ml of water. calculate the molarity of aqueous co solution at the normal partial pressure of co of 0.00036 atm?