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1. A hair drier uses 14 A at 121V. It is used with a transformer in England, where the line voltage is 231 V. What should be the ratio of the turns of the transformer (primary to secondary)?
2. What current will it draw from the 231 V line?
Two parallel, very long straight wires separated by 10 centimeter are carrying 2 Amp and 4 Amp in the similar direction. Find where is the magnetic field zero
Two metal spheres are separated by a distance of 1.1 cm and a power supply maintains a constant potential difference of 830 V between them. what is the distance between the spheres
You are a member of a production crew filming a nature explorer in the Rocky Mountains. At what angle with respect to the shoreline would you advise him to swim to travel directly across the stream to his campfire
A wheel is rotating freely at angular speed 490 rev/min on a shaft whose rotational inertia is negligible. A second wheel, initially at rest and with 5 times the rotational inertia of the first, is suddenly coupled to the same shaft. (a) What is the ..
A 900 kg car travelling east at 15 m/s collides with 750 kg travelling north at 20 m/s. what is the speed of the wreckage
If the barge can only be pushed 18 cm deeper into the water before water overflows to sink it, how many 400 kg horses can it carry.
a pair of narrow parallel slits separated by a distance of 0.294 mm are illuminated by the green component from a
a projectile is fired at angle of theta from the horizontal with an initial velocity of vo. the projectile strikes the
A ball thrown into the air lands on the same horizontal level, 31 m away, and 2.6 s later. Find the magnitude of the initial velocity
A geodesic dome constructed with an aluminum framework is a nearlyperfect hemisphere; its diameter measures 56.0 {\rm m} on a winter day at a temperature of -10{\rm ^\circ C}. How much more interior space does the dome have
An automobile tire has a radius of 0.430 m, and its center moves forward with a linear speed of v = 14.0 m/s. Determine the angular speed of the wheel
a physics book slides off a horizontal tabletop with a speed of 1.10 . it strikes the floor in 0.350 . ignore air
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