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A transformer connected to a 120-v (rms) at line is to supply 13,000V (rms) for a neon sign. To reduce shock hazard, a fuse is to be inserted in the primary circuit; the fuse is to blow when the rms current in the secondary circuit exceeds 8.50 mA. (a) What is the ratio of secondary to primary turns of the transformer? (b) What power should be supplied to the transformer when the rms secondary current is 8.50 mA? (c) What current rating must the fuse in the primary circuit have?
During a cardiac cycle, the heart squeezes about 65g of blood on each contraction into the arterial circulation. what is the maximum force acting on the center of mass of the blood
a long straight wire with radius r carries electric current i uniformly distributed over the cross section of the
A car races at a constant speed of 25 m/s around a circular track with a radius of 150 meters. find the displacement between the starting and ending points
A person with a near-point distance of 25 cm finds that a magnifying glass gives an angular magnification that is 1.5 times larger, What is the focal length of the magnifying glass
An elevator with a mass of 1000 kg, including passengers, is ascending at constant speed. What is the power delivered by a motor for this ascend
A series AC circuit contains a resistor, an inductor of 220 mH, a capacitor of 6.00 µF, and a source with ?Vmax = 240 V operating at 50.0 Hz. Calculate the capacitive reactance
The mass of a certain planet is 6.93×1023 kg, and its radius is 1111 km. What is the acceleration due to gravity on the planet's surface
During a fun run a girl runs for 12 s moving 2.7 m/s. She then accelerates at 0.5 m/s^2 over the next 25 m. What distance did she cover during the entire period
A stick of uniform density with mass M = 8 kg and lengthL = 0.7 m is pivoted about an axle which is perpendicularto its length and located 0.15 m from one end. Ignore any friction between the stick and the axle.
A cubic box of volume = 0.34300m^3 is filled with air at atmospheric pressure at 20.000*C. What is the net force on one side of the box
A test rocket is launched, starting on the ground, from rest, by accelerating it along an incline with constant acceleration "a", what is the position vector when the rocket is at its highest point
Lurking alligators. An alligator waits for prey by floating with only the top of its head exposed, so that the preycannot easily see it. One way it can adjust the extent of sinkingis by controlling the size of its lungs.
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