Secondary voltage = primary voltage · (secondary turns / primary turns)secondary turns = (secondary voltage / primary voltage) · primary turnssecondary turns = (9600-v ac / 120-v ac) · 100 turnsthe transformer supplying power to an artist's light sculpture provides 9600-v ac when supplied by 120-v ac. if there are 100 turns in the transformer's primary coil, how many turns are there in its secondary coil?

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

How will the system respond to a temperature increase?