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The primary windings of a transformer, which has an 80% efficiency, are connected to110 V ac. The secondary windings are connected across a 2.4 , 60 W lightbulb.
(a) Calculate the current through the primary windings of the transformer.
(b) Calculate the ratio of the number of primary windings of the transformer to the number of secondary windings of the transformer.
a metal rod with a length of 21.0cm lies in the xy-plane and makes an angle of 35.6deg with the positive x-axis and an
A uniformly accelerated car passes three equally spaced traffic signs. The signs are separated by a distance d = 25 m. The car passes the first sign at t = 1.3 s, What is the magnitude of the acceleration of the car
Gamma rays with the very high energy of 2.2×10^13 eV are occasionally observed from distant astrophysical sources. What is the frequency corresponding to this photon energy
A 53.5 kg person takes a nap in a (lightweight) backyard hammock. Both ropes supporting the hammock are at an angle of 12.9° above the horizontal. Find the tension in the ropes.
A stone is projected at a cliff H=60 meters with initial speed 75m/s at 60degrees above the horizontal. How long does it take for the stone to strike the top of the cliff?
An Olympic long jumper leaves the ground at an angle of 23 degrees and travels through the air a horizontal distance of 9.7 meters before landing
Ideally, when a thermometer is used to measure the temperature of an object, the temperature of the object itself should not change. What was the temperature of the water before the insertion of the thermometer
Presume the child remains horizontal during the fall to the floor. Note that a more complicated fall could result in a head velocity greater or less than the speed you calculate.
A viewing window in the Atlanta aquarium is 55 inches wide and 46 inches high. what is the outward force on the window
A small current element at the origin has a length of 1.2 mm and carries a current of 3.9 A in the +z direction. Find the magnitude and direction of the magnetic field due to this current element at the point (0, 3.7 m, 2.0 m).
we all sound like great singers in the shower due to standing waves. assume that your shower is 2.50m about 8.22 ft
A crate is hanging from a rope which is attached to a metal ring through which a second rope runs. What is the angle if the tension in rope 1 is 1.30 times the tension in rope 2
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