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A step-down transformer (turns ratio = 1:8) is utilized with an electric train to reduce the voltage from the wall receptacle to a value needed to operate the train. When the train is running, the current in the secondary coil is 1.8 A. What is the current in the primary coil?
One end of a stretched ideal spring is attached to an airtrack and the other is attached to a glider with a mass of 0.360. Find the magnitude of the maximum acceleration of the glider
a particle that carries a net charge of -41.8 ?c is held in a region of constant uniform electric field. the electric
a 50 w light bulb shines through two polarizers. after having passed through the first polarizer the electric field
Consider a small car of mass 1236 kg and a large sport utility vehicle (SUV) of mass 3960 kg. The SUV is traveling at the speed limit (v = 33 m/s). Find the speed of the small car
A 13.0-g wad of sticky clay is hurled horizontally at a 110-g wooden block initially at rest on a horizontal surface. The clay sticks to the block.what was the speed of the clay immediately before impact
Temperatures are often measured with electrical resistance thermometers. Suppose that the resistance of such a resistance thermometer is 152 when its temperature is 25.4 °C. What is the temperature of the liquid
In 4 to 5 billion years, the Sun is expected to enter a red giant phase, in which its outer layers will gradually expand out beyond Earth's present orbit. If the Sun's angular momentum is conserved as it expands, and its mass doesn't change, will its..
A 300KG mass rest at the bottom of a 15 degree incline. Ms=.52 and Mk=.36, How much force is needed to start the mass moving
An infinite conducting sheet lies in the xy plane. It has a width of 4.5 cm and a current density of 5200 A/m^2 in the negative direction. what is the direction of the force on the electron
An electric heater is used to heat a room of volume 66 m3. Air is brought into the room at 5°C and is completely replaced twice per hour. what minimum wattage must the heater have
A 735 N man stands in the middle of a frozen pond of radius 5.0 m. He isunable to get to the other side because of a lack of friction between his shoes and the ice. To overcome this difficulty, hethrows his 1.2 kg physics text book horizontally towar..
A small object of mass 3.30 g and charge-24 µC "floats" in a uniformelectric field. What is the magnitude and direction of the electric field
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