Fill in the blanks in the following paragraph to correctly identify the properties of devices that use electromagnetism. (1 point) A(n) changes mechanical energy into . A(n) changes electric energy into . A(n) changes the voltage of an alternating current. A(n) transformer has more loops in the primary coil than in the secondary coil. A(n) transformer has loops in the primary coil than in the secondary coil.

What is the kinetic energy of a 10-kg bicycle moving at 10 m/s

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j