At a certain location the earth's magnetic field is 0.00004t at an angle 40 degrees to vertical, a vertical wire carries a certain current of 15a. find the force on 20m of the wire

A1kg cart slams into a stationary 1kg cart at 2 m/s. the carts stick together and move forward at a speed of 1 m/sl. determine whether kinetic energy was conserved in the collision. use the law of conservation of energy to explain the collision

The least penetrating form of radiation is

Infrared radiation has wavelengths that are shorter than visible light is part of the visible light spectrum has wavelengths that are longer than visible light has the same wavelengths as ultraviolet radiation