The primary coil of a transformer has 180 turns more than the number of turns of the secondary coil. An output voltage of 18v is obtained when the input voltage is 45v. Calculate the number of turns in the secondary coil.

Consider two metallic rods mounted on insulated supports. one is neutral, the other positively charged. you bring the two rods close to each, but without contact, and briefly ground the the neutral rod by touching it with your hand. show answer correct answer what would be resulting charge (if any) on the initially neutral rod

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

1. explain how you calculate the net force in any direction on the box. 2. suppose an upward force of 15n is added to the box. what will be the net vertical force on the box? 3. what force could be applied to the box to make the net force in the horizontal direction zero? explain. 4. suppose a force of 25n to the right is added to the box. what will be the net force to the right?