Acertain electric dipole consists of charges q and –q separated by distance d, oriented along the x-axis as shown in the figure. find an expression for the magnitude of the electric field e of the dipole at a point far away in the y-direction, a distance r away from the midpoint of the dipole. assume that r is much greater than d. enter your answer in terms of q, d, r, and ε0.

Aspecial electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop ride at an amusement park. the sensor measures the magnitude of the normal force that the seat exerts on a rider. the loop-the-loop ride is in the vertical plane and its radius is 23 m. sitting on the seat before the ride starts, a rider is level and stationary, and the electronic sensor reads 740 n. at the top of the loop, the rider is upside down and moving, and the sensor reads 370 n. what is the speed of the rider at the top of the loop?

Which is the best for showing percentages of different types of cars sold(gas hybrid , electric , other ) in the united states ?

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?