A 0.248 kg puck, initially at rest on a horizontal, frictionless surface, is struck by a 0.148 kg puck moving initially along the x axis with a speed of 2.82 m/s. After the collision, the 0.148 kg puck has a speed of 1.82 m/s at an angle of 25◦ to the positive x axis. Find the fraction of kinetic energy lost in the collision.

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b. b. at twice the distance, the magnitude of the field is 2b. c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.