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A transformer has 300 turns on its secondary and 100 turns on its primary. The primary is connected to a 12-V source.
(a) What is the voltage output of the secondary?
(b) If 2.0 A flows in the primary coil, how much current is there in the secondary coil?
A space station in the form of a large wheel, 311m in diamter, rotates to provide an "artificial gravity" of 5.2m/s^2 for people located on the outer rim. Find the rotational frequency of the wheel
A runner wearing spiked shoes pulls a 18 kg sled across frictionless ice using a horizontal spring with spring constant 170 N/m. What is the acceleration of the sled
A cylindrical volume of radius a is filled with charge of uniform density ρ. We want to know the potential energy per unit length of this cylinder of charge, that is, the work done per unit length in assembling it. Calculate this by building u..
A merry-g-round (I=1/2MR^2) of mas 250kg and radius 3m has been spun so that is has an angular velocity of 15 rad/s. what is the final angular velocity of the merry-go-round
A daring ranch hand sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. How long (s) is he in the air
Two strings identical in length and made of the similar material are subjected to tensions in the proportion of 1 to 4; If they vibrate at the equal frequency, explain how do their diameters compare
A molecule of DNA (deoxyribonucleic acid) is 2.04 µm long. Determine the effective spring constant of the molecule
Two metal spheres, each of radius 5.0 cm, have a center-to-center separationof 3.20 m. Sphere 1 hascharge +1.10 10-8 C. Sphere 2 hascharge of -5.00 10-8C.
The guaranteed accuracy of a flow meter working on thermal principle is ± 3% of full scale reading of 2.5 x 10-6 m3/s. If the flow measured by this meter is 1.25 x 10-6 m3/s, calculate the limiting error in percent
A spring with a force constant of 1495 N/m is compressed 11.1 cm. Find the work done by the force compressing the spring
A spring attached to the ceiling of an elevator is 10 cm long when nothing is hanging from it. It is 12 cm long when a certain mass is hanging from it and the elevator is at rest. How long will the spring be if the elevator moves downwards with a ..
A skier of mass 70kg is pulled up a slope by a motor driven cable. the work required to pul him 60m up a 30 degrees slope, What horsepower must a motor have to perform this task
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