g Under ordinary conditions, gases have indices of refraction only a little greater than thatofvacuum, i.e.,n=1+ε,whereεissome small number. Suppose that a ray crosses a boundary between a region of vacuum and a re- gion in which the index of refraction is 1 + ε. Find the maximum angle by

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?

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Which statement correctly describes the relationship between frequency and wavelength?