1. The potential difference between the terminals a cell in open circuit is 2.2volt. With resistance of 5ohm across the terminals of a cell, the terminal potential difference is 1.8 volt. Calculate the internal resistance.​

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?

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?