The string of a simple pendulum is held in horizontal position and the bob is released. Find the acceleration of the bob when the string makes an angle theta with downward vertical. How to solve this?​

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

Which situation will have the highest resistance? a.long wire and high temperatureb.short wire and high temperaturec.long wire and cold temperaturedshort wire and low temperature

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.