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A step-up transformer is designed to have an output voltage of 2200V (rms) when the primary is connected across a 208 V (rms) source.
1. If there are 76 turns on the primary winding, how many turns are necessary on the secondary?
In one of the rocks brought back from the Moon, it is found that70.7 percent of the initial potassium-40 in the rock has decayed to argon-40. determine how old is the rock
The masses of the javelin, discus, and shot are 0.80 kg, 2.0 kg, and 7.2 kg, respectively, and record throws in the corresponding track events are about 89 m, 69 m, and 21 m, respectively. Neglecting air resistance, (a) calculate the minimum initi..
In order to overcome a surface tension of a liquid, a force of1.32x10-2N is required to lift a wire ring ofcircumference 12.0cm. What is the surface tension of the liquid?
A nuclear power reactor generates 2.80 109 W of power. In one year, what is the change in the mass of the nuclear fuel
A hypodermic syringe contains a medicinewith the density of water. The barrel of the syringe has across-sectional area of 2.50x10^-5 m^2. Determine the medicine flow speed through the needle
A 20.0kg light signal hangs from the end of a 7.0m uniform density pole of mass 12.0kg. The pole is free to swivel from the hinge at point A, What is the reaction force (magnitude and direction) at the hinge
A mass M of 1.19 kg is attached to the end of a string whose length is 0.650 m. The mass slides without friction on a horizontal surface as indicated. If the string can withstand a maximum tension of 55.5 N, what is the maximum tangential speed th..
a 180-m-wide river flows due east at a uniform speed of 3.5 ms. a boat with a speed of 6.9 ms relative to the water
A laser beam is reflected by a plane mirror. It is observed that the angle between the incident and reflected beams is 24 degrees. If the mirror is now rotated so that the angle of incidence increases by 6.0 degrees, what is the new angle between the..
At a steam power plant, steam engines work in pairs, the heatoutput of the first one being the approximate heat input of thesecond. at what rate must coal be burned
What is the apparent weight of a cube of iron of volume 0.2 m3 when it is submerged in water? The density of iron is 7800 kg/m3
Object O1 is 14.5 cm to the left of a converging lens with a 12.0-cm focal length. What is the focal length of the second lens
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