Which of the following correctly gives the relationship between linear speed v and angular speed w of a body moving uniformly in a circle of radius r?

What object a collides with object b and bounces back its final momentum is?

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is

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.